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Ac Potentiometer (EMMI)
The document repeatedly discusses potentiometers and magnetic measurements without providing any details about them. It appears to be about electrical measurement devices but does not explain what they are or how they are used.
Potentiometers
The document describes how to use a potentiometer to sample voltages. It provides examples of circuits using potentiometers connected to voltage sources and resistors. It explains how adjusting the potentiometer from the fully clockwise to fully counter-clockwise position samples voltages across its range. The document also provides exercises to build the circuits and record voltage and current measurements at different potentiometer positions.
Slide Wire Dc potentiometer
The slide wire DC potentiometer operates based on the principle that no current will flow through a galvanometer when the voltage drop across a portion of a slide wire equals the EMF of a battery being measured. It consists of a uniform slide wire connected in a circuit with a battery, galvanometer, and rheostat. To measure an unknown battery's EMF, the sliding contact is adjusted until the galvanometer reads zero, then the EMF is calculated based on the voltage drop across the slide wire segment. EMF ratios can also be determined by comparing the lengths of slide wire segments needed to balance each battery's voltage.
Potentiometers
This document provides specifications for several series of potentiometers, including their electrical and mechanical characteristics. It describes potentiometers with carbon and cermet resistive layers in closed and open configurations ranging in size from 8mm to 18mm. Electrical specifications include nominal resistance values, resistance tolerances, temperature coefficients, voltage ratings, and more. Mechanical specifications cover rotation angle, torque, weight, and cycle life. Custom specifications are available upon request. Contact information is provided for offers and inquiries.
Potentiometric device
Potentiometers are variable resistance devices. A change in the linear or angular displacement of a potentiometer varies the effective length of its conductor, and therefore the resistance of the device.
Potentiometer Experiment 1
JEE Physics/ Lakshmikanta Satapathy/ Direct current/ HOT Question on Potentiometer experiment on conditions of obtaining null point answered with related concepts
potentiometry
This document discusses the principles of potentiometric measurement. Potentiometry involves measuring the potential of an electrochemical cell under conditions of zero current flow, allowing the cell composition to remain unchanged. The potential is related to analyte concentration by the Nernst equation. Potentiometric cells consist of a sensing electrode and a reference electrode separated by a salt bridge. The potential difference between the electrodes corresponds to analyte levels. Common sensing electrodes include ion-selective electrodes and metallic electrodes like silver or copper that respond to specific ions.
Potentiometry
Potentiometry uses a reference electrode and an indicator electrode to measure the potential difference in a sample solution. When the electrodes are placed in the solution, the potential is generated based on the concentration of ions present. There are several types of potentiometric titrations including acid-base, redox, complexometric, and precipitation titrations. Potentiometry has many applications in fields like clinical chemistry, environmental analysis, potentiometric titrations, agriculture, detergent manufacturing, food processing and more. It is used to analyze important ions and determine equivalence points during titrations.
Recommandé
Ac Potentiometer (EMMI)
The document repeatedly discusses potentiometers and magnetic measurements without providing any details about them. It appears to be about electrical measurement devices but does not explain what they are or how they are used.
Potentiometers
The document describes how to use a potentiometer to sample voltages. It provides examples of circuits using potentiometers connected to voltage sources and resistors. It explains how adjusting the potentiometer from the fully clockwise to fully counter-clockwise position samples voltages across its range. The document also provides exercises to build the circuits and record voltage and current measurements at different potentiometer positions.
Slide Wire Dc potentiometer
The slide wire DC potentiometer operates based on the principle that no current will flow through a galvanometer when the voltage drop across a portion of a slide wire equals the EMF of a battery being measured. It consists of a uniform slide wire connected in a circuit with a battery, galvanometer, and rheostat. To measure an unknown battery's EMF, the sliding contact is adjusted until the galvanometer reads zero, then the EMF is calculated based on the voltage drop across the slide wire segment. EMF ratios can also be determined by comparing the lengths of slide wire segments needed to balance each battery's voltage.
Potentiometers
This document provides specifications for several series of potentiometers, including their electrical and mechanical characteristics. It describes potentiometers with carbon and cermet resistive layers in closed and open configurations ranging in size from 8mm to 18mm. Electrical specifications include nominal resistance values, resistance tolerances, temperature coefficients, voltage ratings, and more. Mechanical specifications cover rotation angle, torque, weight, and cycle life. Custom specifications are available upon request. Contact information is provided for offers and inquiries.
Potentiometric device
Potentiometers are variable resistance devices. A change in the linear or angular displacement of a potentiometer varies the effective length of its conductor, and therefore the resistance of the device.
Potentiometer Experiment 1
JEE Physics/ Lakshmikanta Satapathy/ Direct current/ HOT Question on Potentiometer experiment on conditions of obtaining null point answered with related concepts
potentiometry
This document discusses the principles of potentiometric measurement. Potentiometry involves measuring the potential of an electrochemical cell under conditions of zero current flow, allowing the cell composition to remain unchanged. The potential is related to analyte concentration by the Nernst equation. Potentiometric cells consist of a sensing electrode and a reference electrode separated by a salt bridge. The potential difference between the electrodes corresponds to analyte levels. Common sensing electrodes include ion-selective electrodes and metallic electrodes like silver or copper that respond to specific ions.
Potentiometry
Potentiometry uses a reference electrode and an indicator electrode to measure the potential difference in a sample solution. When the electrodes are placed in the solution, the potential is generated based on the concentration of ions present. There are several types of potentiometric titrations including acid-base, redox, complexometric, and precipitation titrations. Potentiometry has many applications in fields like clinical chemistry, environmental analysis, potentiometric titrations, agriculture, detergent manufacturing, food processing and more. It is used to analyze important ions and determine equivalence points during titrations.
Robot Sensing Systems - 1
This document summarizes three transducers: a potentiometer, LVDT, and resolver. A potentiometer converts rotational or linear displacement into a potential difference based on the position of a wiper along a resistor. An LVDT translates linear motion into electrical signals using a movable core within primary and secondary coils. It determines displacement by measuring the induced voltage. A resolver measures rotational degrees using a rotating shaft to induce voltages on stationary coils, producing sine and cosine feedback currents whose magnitudes indicate the shaft angle.
AC bridges ( Weins bridge, Desauty bridge, Maxwell's inductance bridge)
This document summarizes several AC bridge circuits used for measuring unknown impedances. It describes Maxwell's inductance-capacitance bridge which measures inductance by comparing it to a standard variable capacitor. De Sauty's bridge is used to determine the capacity of an unknown capacitor in terms of a standard known capacitor. Wein's bridge is primarily a frequency determining bridge but can also measure capacitance. It provides equations for calculating resistance ratios and oscillation frequency at balance.
A.C. bridges
This document summarizes several types of AC bridges used to measure resistance, inductance, and capacitance. It describes Maxwell's inductance bridge, which uses two known impedances and two pure resistances to measure an unknown inductance. It also discusses Hay's bridge, a modification of Maxwell's bridge that can measure higher quality factor inductors. The document outlines Schering bridge, which measures capacitance and loss of a capacitor using a loss-free standard capacitor. Finally, it briefly introduces Wien's parallel bridge, a ratio bridge used in audio-frequency R-C oscillators to measure capacitance ratios.
1 Titrations
Titration is a technique used to determine the concentration of an unknown substance by reacting it with a known quantity of a titrant. The equivalence point occurs when stoichiometric amounts of the reactants have reacted. An indicator is used to identify the endpoint, which may differ from the equivalence point. The pH at the equivalence point provides information about whether a strong acid/base or weak acid/base reaction took place.
Polarimeter
A polarimeter is an instrument used to measure the angle of rotation caused when polarized light passes through an optically active substance. It consists of a polarimeter tube and operation panel. When light passes through a left-handed or right-handed sample, the translucent semicircular fields in the polarimeter gradually change. There are different types of polarimeters. The specific rotation, a unique property of substances, can be calculated using the measured angle of rotation, concentration, temperature, and length of the sample cell. Polarimeters are used in industries like chemistry, food, beverages, and pharmaceuticals for applications such as quality control and purity measurements.
single phase static energy meter
This document summarizes the presentation on 1-phase static energy meters given by Uday. It discusses the company profile of Pal Mohan Electronics, which manufactures energy meters. It then outlines the contents of the presentation, which includes how energy meters work, units of measurement, types of meters, tampering issues, the main functions of meters, and Pal Mohan's production process from the store department to quality control testing to packaging. The production process is described in three sentences.
Bridge Measurement Circuit
This document discusses different types of bridge circuits used to measure electrical components. It describes Maxwell's bridge which can measure inductance by comparing it to a variable standard inductance or capacitance. Maxwell's inductance bridge measures inductance directly while his inductance-capacitance bridge measures it based on a variable capacitor. DeSauty bridge is a simple four-arm circuit to compare two capacitances. Schering bridge is widely used to measure unknown capacitors and dielectric losses at alternating current. It has a balance equation independent of frequency.
Bridge 1
The document discusses different types of AC bridges used to measure inductance and capacitance. It describes 6 AC bridges: 1) Similar-Angle Bridge, which measures the impedance of a capacitive circuit. 2) Maxwell-Wein Bridge, which measures unknown inductances with a capacitance standard. 3) Opposite Angle Bridge, where the balance conditions depend on the measurement frequency. 4) Wein Bridge, which can measure either series or parallel components of an impedance. 5) Scherning Bridge, useful for measuring high phase angle insulating properties. Examples are provided to demonstrate calculations for determining unknown impedance values using the bridge equations.
Solid Solutions
Definition, Classification,Hume Rothery Rules
Reference: Material Science and Engineering, William Callister
“Temperature Sensors” Thermocouple | Thermistor | Resister Temperature Detectors
Thermocouples, thermistors, and resistance temperature detectors (RTDs) are three common types of temperature sensors. Thermocouples generate voltage based on the temperature difference between two dissimilar metals and can measure up to 1800°C, but have lower accuracy than other sensors. Thermistors use the change in resistance of semiconductor materials with temperature; negative temperature coefficient thermistors are often used for temperature sensing. RTDs measure temperature by correlating the resistance of a platinum coil with temperature; they offer high accuracy over a wide range. The presentation provides details on the construction, operation, advantages, disadvantages and applications of each sensor type.
FTIR spectrophotometer
This document provides an overview of Fourier transform infrared (FTIR) spectroscopy. It discusses the theory behind FTIR, which uses an interferometer to measure all infrared frequencies simultaneously rather than individually. The key components of an FTIR spectrometer are described, including the radiation source, interferometer, and various detector types. Advantages of FTIR over dispersive instruments include its simpler design, elimination of stray light issues, and ability to rapidly collect an entire infrared spectrum. Applications of FTIR spectroscopy are also mentioned.
AC Bridges: Balance Condition
A.C. Bridges are those circuits which are used to measure the unknown resistances, capacitance and inductance
Power Measurement In 3-phase AC Circuits
All the three methods of measurement of power in 3-phase ac circuits. 3,2,1--watter methods explained.
Potentiometry new
Potentiometry is an electroanalytical technique where the potential difference between two electrodes is measured under conditions of no current flow. It was invented in 1841 by Johann Christian Poggendorff using a slide-wire potentiometer. A potentiometric cell consists of a reference electrode with a known potential and an indicator electrode, whose potential changes depending on the analyte concentration. The potential difference between the electrodes is measured to determine the analyte concentration. Common applications of potentiometry include titrations, analysis of pollutants, drugs, foods, and more.
Power and Energy Measurement
This document discusses various instruments used to measure power and energy in electrical circuits. It describes how power can be measured in direct current circuits using a voltmeter, ammeter and Ohm's law, and in alternating current circuits using voltage, current and power factor. Several types of instruments are introduced for measuring power at low levels or specific wavelengths, including bolometers, calorimeters and wattmeters. Energy measurement is also covered, defining energy as power over time and describing various meters used to measure energy in direct and alternating current circuits.
Polarimetry
This document discusses polarimetry, which is the study of the rotation of polarized light by optically active substances. Polarimetry can be used to both identify and quantify compounds based on their ability to rotate plane-polarized light clockwise or counterclockwise. The document outlines the principles of polarimetry using optically active compounds and the instrumentation of a polarimeter. Applications of polarimetry include identification of compounds, determination of optical activity, and uses in the chemical, food, beverage, pharmaceutical, and sugar industries for purity testing and concentration measurements.
Ac bridges
This document discusses several types of AC bridges used to measure unknown resistances, capacitances, and inductances. The Maxwell's inductance bridge uses two known impedances on one side and two pure resistances on the other to measure an unknown impedance. The Maxwell's capacitance bridge can measure unknown inductance by compensating the positive phase angle of inductance with the negative phase angle of capacitance. The Anderson bridge precisely measures unknown inductance over a wide range by using a known capacitance and resistance.
potentiometry
Potentiometry is a method of analysis that determines the concentration of an ion or substance by measuring the potential developed at a sensitive indicator electrode immersed in the solution. There are two main types of indicator electrodes: metallic electrodes where redox reactions occur on the surface, and membrane electrodes where charge exchange occurs across a selective surface. Reference electrodes such as silver/silver chloride are used along with indicator electrodes to complete the circuit and allow measurement of potential. Potentiometry can be used for direct concentration measurements or titration applications such as acid-base, precipitation, complexation, and redox reactions.
Single Phase Induction Type Energy Meter
The document summarizes the construction and working of a single phase induction type energy meter. It consists of a driving system, moving system, braking system and registering system. The driving torque is proportional to the supply voltage, load current and their phase difference, causing the disk to rotate. The number of rotations is proportional to the energy consumed. Potential errors include incorrect fluxes/phase angles and friction changes. Adjustments include preliminary light load and creep adjustments to calibrate the meter.
Current Electricity Class 12 Part-2
1. This document discusses several topics related to electricity including Kirchhoff's laws, Wheatstone bridge, metre bridge, and potentiometer.
2. Kirchhoff's laws include the junction rule which states the algebraic sum of currents at a junction is zero, and the loop rule which states the algebraic sum of potential drops around any closed loop is zero.
3. The Wheatstone bridge and metre bridge are used to measure unknown resistances based on balancing a galvanometer using a sliding contact to adjust potential differences.
4. A potentiometer can be used to compare electromotive forces (EMFs) of cells by finding the balance point where the potential is equal and opposite to the cell's
7.4.6 slip
This document describes how to calculate the rotor frequency of a two-pole, 50 Hz induction motor given the rotor speed of 2850 rpm. It shows that the slip speed is 3000 rpm, the slip percentage is 5%, and using the formula fs x %slip / 100, the rotor frequency is calculated to be 2.5 Hz.
4.2.1 Better Load
The document describes the circuits and loads for an electrical installation. It lists 19 circuits with various lighting, power outlet, motor, and appliance loads. It calculates the demand current in amps for each phase based on adding the full load or percentage of full load for each circuit based on rating and number of devices. The highest calculated demand is 153.25 amps on phase L2. With a 10% allowance for future additions, the total recommended maximum current is 168.575 amps.
Contenu connexe
En vedette
Robot Sensing Systems - 1
This document summarizes three transducers: a potentiometer, LVDT, and resolver. A potentiometer converts rotational or linear displacement into a potential difference based on the position of a wiper along a resistor. An LVDT translates linear motion into electrical signals using a movable core within primary and secondary coils. It determines displacement by measuring the induced voltage. A resolver measures rotational degrees using a rotating shaft to induce voltages on stationary coils, producing sine and cosine feedback currents whose magnitudes indicate the shaft angle.
AC bridges ( Weins bridge, Desauty bridge, Maxwell's inductance bridge)
This document summarizes several AC bridge circuits used for measuring unknown impedances. It describes Maxwell's inductance-capacitance bridge which measures inductance by comparing it to a standard variable capacitor. De Sauty's bridge is used to determine the capacity of an unknown capacitor in terms of a standard known capacitor. Wein's bridge is primarily a frequency determining bridge but can also measure capacitance. It provides equations for calculating resistance ratios and oscillation frequency at balance.
A.C. bridges
This document summarizes several types of AC bridges used to measure resistance, inductance, and capacitance. It describes Maxwell's inductance bridge, which uses two known impedances and two pure resistances to measure an unknown inductance. It also discusses Hay's bridge, a modification of Maxwell's bridge that can measure higher quality factor inductors. The document outlines Schering bridge, which measures capacitance and loss of a capacitor using a loss-free standard capacitor. Finally, it briefly introduces Wien's parallel bridge, a ratio bridge used in audio-frequency R-C oscillators to measure capacitance ratios.
1 Titrations
Titration is a technique used to determine the concentration of an unknown substance by reacting it with a known quantity of a titrant. The equivalence point occurs when stoichiometric amounts of the reactants have reacted. An indicator is used to identify the endpoint, which may differ from the equivalence point. The pH at the equivalence point provides information about whether a strong acid/base or weak acid/base reaction took place.
Polarimeter
A polarimeter is an instrument used to measure the angle of rotation caused when polarized light passes through an optically active substance. It consists of a polarimeter tube and operation panel. When light passes through a left-handed or right-handed sample, the translucent semicircular fields in the polarimeter gradually change. There are different types of polarimeters. The specific rotation, a unique property of substances, can be calculated using the measured angle of rotation, concentration, temperature, and length of the sample cell. Polarimeters are used in industries like chemistry, food, beverages, and pharmaceuticals for applications such as quality control and purity measurements.
single phase static energy meter
This document summarizes the presentation on 1-phase static energy meters given by Uday. It discusses the company profile of Pal Mohan Electronics, which manufactures energy meters. It then outlines the contents of the presentation, which includes how energy meters work, units of measurement, types of meters, tampering issues, the main functions of meters, and Pal Mohan's production process from the store department to quality control testing to packaging. The production process is described in three sentences.
Bridge Measurement Circuit
This document discusses different types of bridge circuits used to measure electrical components. It describes Maxwell's bridge which can measure inductance by comparing it to a variable standard inductance or capacitance. Maxwell's inductance bridge measures inductance directly while his inductance-capacitance bridge measures it based on a variable capacitor. DeSauty bridge is a simple four-arm circuit to compare two capacitances. Schering bridge is widely used to measure unknown capacitors and dielectric losses at alternating current. It has a balance equation independent of frequency.
Bridge 1
The document discusses different types of AC bridges used to measure inductance and capacitance. It describes 6 AC bridges: 1) Similar-Angle Bridge, which measures the impedance of a capacitive circuit. 2) Maxwell-Wein Bridge, which measures unknown inductances with a capacitance standard. 3) Opposite Angle Bridge, where the balance conditions depend on the measurement frequency. 4) Wein Bridge, which can measure either series or parallel components of an impedance. 5) Scherning Bridge, useful for measuring high phase angle insulating properties. Examples are provided to demonstrate calculations for determining unknown impedance values using the bridge equations.
Solid Solutions
Definition, Classification,Hume Rothery Rules
Reference: Material Science and Engineering, William Callister
“Temperature Sensors” Thermocouple | Thermistor | Resister Temperature Detectors
Thermocouples, thermistors, and resistance temperature detectors (RTDs) are three common types of temperature sensors. Thermocouples generate voltage based on the temperature difference between two dissimilar metals and can measure up to 1800°C, but have lower accuracy than other sensors. Thermistors use the change in resistance of semiconductor materials with temperature; negative temperature coefficient thermistors are often used for temperature sensing. RTDs measure temperature by correlating the resistance of a platinum coil with temperature; they offer high accuracy over a wide range. The presentation provides details on the construction, operation, advantages, disadvantages and applications of each sensor type.
FTIR spectrophotometer
This document provides an overview of Fourier transform infrared (FTIR) spectroscopy. It discusses the theory behind FTIR, which uses an interferometer to measure all infrared frequencies simultaneously rather than individually. The key components of an FTIR spectrometer are described, including the radiation source, interferometer, and various detector types. Advantages of FTIR over dispersive instruments include its simpler design, elimination of stray light issues, and ability to rapidly collect an entire infrared spectrum. Applications of FTIR spectroscopy are also mentioned.
AC Bridges: Balance Condition
A.C. Bridges are those circuits which are used to measure the unknown resistances, capacitance and inductance
Power Measurement In 3-phase AC Circuits
All the three methods of measurement of power in 3-phase ac circuits. 3,2,1--watter methods explained.
Potentiometry new
Potentiometry is an electroanalytical technique where the potential difference between two electrodes is measured under conditions of no current flow. It was invented in 1841 by Johann Christian Poggendorff using a slide-wire potentiometer. A potentiometric cell consists of a reference electrode with a known potential and an indicator electrode, whose potential changes depending on the analyte concentration. The potential difference between the electrodes is measured to determine the analyte concentration. Common applications of potentiometry include titrations, analysis of pollutants, drugs, foods, and more.
Power and Energy Measurement
This document discusses various instruments used to measure power and energy in electrical circuits. It describes how power can be measured in direct current circuits using a voltmeter, ammeter and Ohm's law, and in alternating current circuits using voltage, current and power factor. Several types of instruments are introduced for measuring power at low levels or specific wavelengths, including bolometers, calorimeters and wattmeters. Energy measurement is also covered, defining energy as power over time and describing various meters used to measure energy in direct and alternating current circuits.
Polarimetry
This document discusses polarimetry, which is the study of the rotation of polarized light by optically active substances. Polarimetry can be used to both identify and quantify compounds based on their ability to rotate plane-polarized light clockwise or counterclockwise. The document outlines the principles of polarimetry using optically active compounds and the instrumentation of a polarimeter. Applications of polarimetry include identification of compounds, determination of optical activity, and uses in the chemical, food, beverage, pharmaceutical, and sugar industries for purity testing and concentration measurements.
Ac bridges
This document discusses several types of AC bridges used to measure unknown resistances, capacitances, and inductances. The Maxwell's inductance bridge uses two known impedances on one side and two pure resistances on the other to measure an unknown impedance. The Maxwell's capacitance bridge can measure unknown inductance by compensating the positive phase angle of inductance with the negative phase angle of capacitance. The Anderson bridge precisely measures unknown inductance over a wide range by using a known capacitance and resistance.
potentiometry
Potentiometry is a method of analysis that determines the concentration of an ion or substance by measuring the potential developed at a sensitive indicator electrode immersed in the solution. There are two main types of indicator electrodes: metallic electrodes where redox reactions occur on the surface, and membrane electrodes where charge exchange occurs across a selective surface. Reference electrodes such as silver/silver chloride are used along with indicator electrodes to complete the circuit and allow measurement of potential. Potentiometry can be used for direct concentration measurements or titration applications such as acid-base, precipitation, complexation, and redox reactions.
Single Phase Induction Type Energy Meter
The document summarizes the construction and working of a single phase induction type energy meter. It consists of a driving system, moving system, braking system and registering system. The driving torque is proportional to the supply voltage, load current and their phase difference, causing the disk to rotate. The number of rotations is proportional to the energy consumed. Potential errors include incorrect fluxes/phase angles and friction changes. Adjustments include preliminary light load and creep adjustments to calibrate the meter.
Current Electricity Class 12 Part-2
1. This document discusses several topics related to electricity including Kirchhoff's laws, Wheatstone bridge, metre bridge, and potentiometer.
2. Kirchhoff's laws include the junction rule which states the algebraic sum of currents at a junction is zero, and the loop rule which states the algebraic sum of potential drops around any closed loop is zero.
3. The Wheatstone bridge and metre bridge are used to measure unknown resistances based on balancing a galvanometer using a sliding contact to adjust potential differences.
4. A potentiometer can be used to compare electromotive forces (EMFs) of cells by finding the balance point where the potential is equal and opposite to the cell's
En vedette (20)
AC bridges ( Weins bridge, Desauty bridge, Maxwell's inductance bridge)
AC bridges ( Weins bridge, Desauty bridge, Maxwell's inductance bridge)
“Temperature Sensors” Thermocouple | Thermistor | Resister Temperature Detectors
“Temperature Sensors” Thermocouple | Thermistor | Resister Temperature Detectors
Plus de Talia Carbis
7.4.6 slip
This document describes how to calculate the rotor frequency of a two-pole, 50 Hz induction motor given the rotor speed of 2850 rpm. It shows that the slip speed is 3000 rpm, the slip percentage is 5%, and using the formula fs x %slip / 100, the rotor frequency is calculated to be 2.5 Hz.
4.2.1 Better Load
The document describes the circuits and loads for an electrical installation. It lists 19 circuits with various lighting, power outlet, motor, and appliance loads. It calculates the demand current in amps for each phase based on adding the full load or percentage of full load for each circuit based on rating and number of devices. The highest calculated demand is 153.25 amps on phase L2. With a 10% allowance for future additions, the total recommended maximum current is 168.575 amps.
4.1.13 Light Demand 3
This short document does not provide any substantive information to summarize in 3 sentences or less. It only notes that an explanation is not contained in a workbook, but provides no other context or details.
4.1.12 Light Demand 2 Table Part2
The document outlines the demand calculations for 19 different circuit load groups across 3 phases. It lists the load description, current allowance calculation method, and resulting demand current for each phase. The total demand current per phase is calculated at the bottom, with values of 143.8 amps for phase 1, 153.25 amps for phase 2, and 145.05 amps for phase 3.
4.1.11 Light Demand 2 Table
The document contains a table that calculates the current demand per phase for various circuit load groups in an electrical system. It lists 19 load groups categorized by letters A through D, describing each load. It shows the current allowance calculation method and resulting demand in amps for each phase. The total demand current calculated per phase is 143.8 amps for L1, 153.25 amps for L2, and 145.05 amps for L3.
4.1.10 Light Demand 2
This 3 sentence document provides instructions to refer to a specific table on a specific page of a particular standard for additional explanatory information not contained in the current workbook. The instructions direct the reader to Table C2 on page 359 of AS/NZA 3000:2007 for an explanation that is not included in the current document.
4.1.9 Light Demand 1
The document describes the functions of 19 electrical circuits in a building. It lists the types of equipment connected to each circuit such as fluorescent lighting, outlets, motors, and appliances. It also indicates which of the 3 electrical phases (L1, L2, L3) each circuit is connected to.
4.1.7 Example Domestic 3
The document calculates the electrical load of communal services in an apartment building. It shows that 24 lighting points will draw 240 watts and 6 10A sockets will draw up to 12A, for a total demand of 18A per phase. The total demand current per phase for communal services is 18A.
4.1.6 Example Domestic 2
The document calculates the electrical load and demand for 6 living units per phase. It lists the types of loads in each unit, the quantity and allowance per unit, and uses this to calculate the total demand current for phases L1, L2 and L3, which is 154.4 amps for each phase. The key loads included are lighting, power outlets, cooking ranges, air conditioners and hot water systems.
4.1.5 Example Domestic 1
This document discusses the number of living units per phase of a project. It calculates that for 18 total living units divided into 3 phases, there would be 6 living units per phase.
4.1.4 Step 2
This document summarizes the electrical load calculations for 11 circuits in a home. It lists the load type and description for each circuit, the current allowance per unit, and calculates the demand in amps for circuits 1-10. The largest demands are 17.7 amps for an air conditioner and 15 amps for an off-peak hot water system. The total calculated demand current for each phase is 40.7, 39.5, and 46.5 amps respectively.
4.1.3 Example Solution Three
The document calculates the electrical load and demand current for 11 circuits in a home. It groups the loads into categories like lighting, outlets, appliances, and assigns each a description, allowance, and demand calculation. The total demand current per phase is summarized at the bottom, with the highest draw of 46.5 amps on phase L3.
4.1.2 Example Three
The document outlines the functions and ratings of 12 electrical circuits. Circuit 1 provides power for 13 indoor lighting points. Circuit 10 powers an air conditioner rated at 23.6 amps per phase and can draw power from circuits L1, L2, and L3. Circuits 11a and 11b each power a controlled load hot water unit rated at 3.6 kW.
4.1.1 Example Single
This document calculates the total demand current for an electrical installation consisting of:
- 21 lighting points and 12 double sockets, contributing 5A and 15A respectively
- 15 single sockets contributing 10A
- A 6kW oven contributing 0.5A
- A 2.4kW water heater contributing 0.33A
The total demand current calculated is 45.83A.
5.4.4 LR Circuits
The document discusses the time constant and final current value for an RL circuit. It states that:
1) The time constant for the circuit is 0.17 seconds based on the given inductance and resistance values.
2) It will take approximately 0.85 seconds (5 time constants) for the current to reach its final value.
3) Using Ohm's law, the approximate final current after 0.85 seconds is 2 amps.
14.5.4 Example 1 Part 1
This document calculates the apparent power, power factor, and phase angle for a circuit. It finds that the apparent power is 2.308 kVA by multiplying the current of 9.615 by the voltage of 240. This apparent power is larger than the actual power of 1.5 kW, indicating a poor power factor of 0.65 or a 49.46 degree phase angle between the current and voltage.
14.1.2 TRA Power
Reactive power (Q) and true power (P) combine to form apparent power (S). Apparent power is the combination of true power, which is the usable energy in a circuit, and reactive power, which is stored energy that results from the combination of voltage and current out of phase.
14.5.8 Example 1 Part 5
This document calculates the true power, apparent power, and total current for a circuit. It determines that the true power is 1.5 kW, the apparent power is 1.5009 kVA, and the power factor is 0.99994. It then calculates that with an apparent power of 1.5009 kVA at 240 Volts, the total current would be 6.25 amps.
Plus de Talia Carbis (20)
Dernier
Le support de présentation des Signaux 2024
Découvrez le support de présentation des Signaux 2024, la conférence des grandes tendances de l'innovation et du numérique.
Ouvrez la porte ou prenez un mur (Agile Tour Genève 2024)
(Conférence dessinée)
Vous êtes certainement à l’origine, ou impliqué, dans un changement au sein de votre organisation. Et peut être que cela ne se passe pas aussi bien qu’attendu…
Depuis plusieurs années, je fais régulièrement le constat de l’échec de l’adoption de l’Agilité, et plus globalement de grands changements, dans les organisations. Je vais tenter de vous expliquer pourquoi ils suscitent peu d'adhésion, peu d’engagement, et ils ne tiennent pas dans le temps.
Heureusement, il existe un autre chemin. Pour l'emprunter il s'agira de cultiver l'invitation, l'intelligence collective , la mécanique des jeux, les rites de passages, .... afin que l'agilité prenne racine.
Vous repartirez de cette conférence en ayant pris du recul sur le changement tel qu‘il est généralement opéré aujourd’hui, et en ayant découvert (ou redécouvert) le seul guide valable à suivre, à mon sens, pour un changement authentique, durable, et respectueux des individus! Et en bonus, 2 ou 3 trucs pratiques!
PRESENTATION DE L'ACTIVE DIRECTORY SOUS WINDOWS SERVEUR.pptx
Active Directory est le service d'annuaire développé par Microsoft pour la gestion des identités et des accès dans les environnements Windows
De l'IA comme plagiat à la rédaction d'une « charte IA » à l'université
L'IA connaît une croissance rapide et son intégration dans le domaine éducatif soulève de nombreuses questions. Aujourd'hui, nous explorerons comment les étudiants utilisent l'IA, les perceptions des enseignants à ce sujet, et les mesures possibles pour encadrer ces usages.
Constat Actuel
L'IA est de plus en plus présente dans notre quotidien, y compris dans l'éducation. Certaines universités, comme Science Po en janvier 2023, ont interdit l'utilisation de l'IA, tandis que d'autres, comme l'Université de Prague, la considèrent comme du plagiat. Cette diversité de positions souligne la nécessité urgente d'une réponse institutionnelle pour encadrer ces usages et prévenir les risques de triche et de plagiat.
Enquête Nationale
Pour mieux comprendre ces dynamiques, une enquête nationale intitulée "L'IA dans l'enseignement" a été réalisée. Les auteurs de cette enquête sont Le Sphynx (sondage) et Compilatio (fraude académique). Elle a été diffusée dans les universités de Lyon et d'Aix-Marseille entre le 21 juin et le 15 août 2023, touchant 1242 enseignants et 4443 étudiants. Les questionnaires, conçus pour étudier les usages de l'IA et les représentations de ces usages, abordaient des thèmes comme les craintes, les opportunités et l'acceptabilité.
Résultats de l'Enquête
Les résultats montrent que 55 % des étudiants utilisent l'IA de manière occasionnelle ou fréquente, contre 34 % des enseignants. Cependant, 88 % des enseignants pensent que leurs étudiants utilisent l'IA, ce qui pourrait indiquer une surestimation des usages. Les usages identifiés incluent la recherche d'informations et la rédaction de textes, bien que ces réponses ne puissent pas être cumulées dans les choix proposés.
Analyse Critique
Une analyse plus approfondie révèle que les enseignants peinent à percevoir les bénéfices de l'IA pour l'apprentissage, contrairement aux étudiants. La question de savoir si l'IA améliore les notes sans développer les compétences reste débattue. Est-ce un dopage académique ou une opportunité pour un apprentissage plus efficace ?
Acceptabilité et Éthique
L'enquête révèle que beaucoup d'étudiants jugent acceptable d'utiliser l'IA pour rédiger leurs devoirs, et même un quart des enseignants partagent cet avis. Cela pose des questions éthiques cruciales : copier-coller est-il tricher ? Utiliser l'IA sous supervision ou pour des traductions est-il acceptable ? La réponse n'est pas simple et nécessite un débat ouvert.
Propositions et Solutions
Pour encadrer ces usages, plusieurs solutions sont proposées. Plutôt que d'interdire l'IA, il est suggéré de fixer des règles pour une utilisation responsable. Des innovations pédagogiques peuvent également être explorées, comme la création de situations de concurrence professionnelle ou l'utilisation de détecteurs d'IA.
Conclusion
En conclusion, bien que l'étude présente des limites, elle souligne un besoin urgent de régulation. Une charte institutionnelle pourrait fournir un cadre pour une utilisation éthique.
Le Comptoir OCTO - Qu’apporte l’analyse de cycle de vie lors d’un audit d’éco...
Par Nicolas Bordier (Consultant numérique responsable @OCTO Technology) et Alaric Rougnon-Glasson (Sustainable Tech Consultant @OCTO Technology)
Sur un exemple très concret d’audit d’éco-conception de l’outil de bilan carbone C’Bilan développé par ICDC (Caisse des dépôts et consignations) nous allons expliquer en quoi l’ACV (analyse de cycle de vie) a été déterminante pour identifier les pistes d’actions pour réduire jusqu'à 82% de l’empreinte environnementale du service.
Vidéo Youtube : https://www.youtube.com/watch?v=7R8oL2P_DkU
Compte-rendu :
MongoDB in a scale-up: how to get away from a monolithic hell — MongoDB Paris...
This is the slide deck of a talk by Alexis "Horgix" Chotard and Laurentiu Capatina presented at the MongoDB Paris User Group in June 2024 about the feedback on how PayFit move away from a monolithic hell of a self-hosted MongoDB cluster to managed alternatives. Pitch below.
March 15, 2023, 6:59 AM: a MongoDB cluster collapses. Tough luck, this cluster contains 95% of user data and is absolutely vital for even minimal operation of our application. To worsen matters, this cluster is 7 years behind on versions, is not scalable, and barely observable. Furthermore, even the data model would quickly raise eyebrows: applications communicating with each other by reading/writing in the same MongoDB documents, documents reaching the maximum limit of 16MiB with hundreds of levels of nesting, and so forth. The incident will last several days and result in the loss of many users. We've seen better scenarios.
Let's explore how PayFit found itself in this hellish situation and, more importantly, how we managed to overcome it!
On the agenda: technical stabilization, untangling data models, breaking apart a Single Point of Failure (SPOF) into several elements with a more restricted blast radius, transitioning to managed services, improving internal accesses, regaining control over risky operations, and ultimately, approaching a technical migration when it impacts all development teams.
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MongoDB in a scale-up: how to get away from a monolithic hell — MongoDB Paris...
MongoDB in a scale-up: how to get away from a monolithic hell — MongoDB Paris...