Energy? Do you know what is energy and how many types of energy is there. How energy is differ from the work, power and how different energy can be utilized for man utilization. Different types of energy like - solar energy, chemical energy, nuclear energy, potential energy, wind energy, mechanical energy, light energy, sound energy, kinetic energy etc are described briefly. Renewable energy which is the backbone of modern energy source and can be beneficial for the power generation at a large scale for future.

1. EnergyEnergy

2. What is EnergyWhat is Energy
• The energy is defined as the capacity toThe energy is defined as the capacity to
perform any work.perform any work.
• When we walk or run or doing any workWhen we walk or run or doing any work
then after some time we feel tired, this isthen after some time we feel tired, this is
because of loss ofbecause of loss of energyenergy of our body.of our body.
• This is the physical property which followsThis is the physical property which follows
the law of conservation.the law of conservation.

3. Types of EnergyTypes of Energy
• Thermal energyThermal energy
• Electrical energyElectrical energy
• light energylight energy
• Sound energySound energy
• Mechanical energyMechanical energy
• Chemical energyChemical energy
• Nuclear energyNuclear energy

4. 1. Thermal Energy1. Thermal Energy
- Heat is a form of energy.- Heat is a form of energy.
- When an object is- When an object is
heated, it means energyheated, it means energy
is added and when anis added and when an
object gives out heat (likeobject gives out heat (like
radiation), the objectradiation), the object
gives out energy.gives out energy.
- The type of energy- The type of energy
involved here is theinvolved here is the
‘‘Thermal energyThermal energy’.’.

5. 2. Electrical energy2. Electrical energy
• ““Electrical energy" refers toElectrical energy" refers to
energy which has beenenergy which has been
converted from electricalconverted from electrical
potential energy.potential energy.
• This energy is supplied by theThis energy is supplied by the
combination ofcombination of electric currentelectric current
andand electrical potentialelectrical potential that isthat is
delivered by the circuit.delivered by the circuit.
• At the point that this electricalAt the point that this electrical
potential energy has beenpotential energy has been
converted to another type ofconverted to another type of
energy, it ceases to beenergy, it ceases to be
electrical potential energy.electrical potential energy.

6. 3. light energy3. light energy
• It can also be defined as theIt can also be defined as the
electromagnetic radiation of visibleelectromagnetic radiation of visible
light.light.
• Since light itself is energy, thenSince light itself is energy, then
another definition is relevant: lightanother definition is relevant: light
is nature’s way of transferringis nature’s way of transferring
energy through space.energy through space.
• The speed of light is aboutThe speed of light is about
300,000 km/s.300,000 km/s.

7. 4. Sound energy4. Sound energy
• Sound is the movement of energySound is the movement of energy
through substances in longitudinalthrough substances in longitudinal
(compression/rarefaction) waves.(compression/rarefaction) waves.
• Sound is produced when a forceSound is produced when a force
causes an object or substance tocauses an object or substance to
vibrate — the energy is transferredvibrate — the energy is transferred
through the substance in a wave.through the substance in a wave.
• We can hear a noise from anWe can hear a noise from an
object when it gives out an energyobject when it gives out an energy
which makes us hearwhich makes us hear..
Sound energy wave

8. 5. Mechanical energy5. Mechanical energy
• mechanical energy is the summechanical energy is the sum
of potential energy and kineticof potential energy and kinetic
energy.energy.
• It is the energy associated withIt is the energy associated with
the motion and position of anthe motion and position of an
object.object.
• Mechanical energy of isolatedMechanical energy of isolated
system that is only subject tosystem that is only subject to
conservative forces theconservative forces the
mechanical energy is constant.mechanical energy is constant.

9. 6. Chemical energy6. Chemical energy
• Energy released andEnergy released and
absorbed during chemicalabsorbed during chemical
reaction.reaction.
• When water is poured onWhen water is poured on
an acid then heatan acid then heat
evolves, it means heatevolves, it means heat
released which is mainlyreleased which is mainly
due to chemical reactiondue to chemical reaction
occurred between wateroccurred between water
and acid.and acid.

10. 7. Nuclear energy7. Nuclear energy
- Energy released- Energy released
during nuclear fissionduring nuclear fission
and fusion reaction isand fusion reaction is
called nuclear energy.called nuclear energy.
- The concept of the- The concept of the
nuclear power plant isnuclear power plant is
based on thisbased on this
principal.principal.

11. RenewableRenewable
energiesenergies
• There are manyThere are many
energies like - solarenergies like - solar
energy, wind energy,energy, wind energy,
geothermal energy,geothermal energy,
etc. Since theseetc. Since these
energies areenergies are
replenished again andreplenished again and
again, these areagain, these are
called “called “RenewableRenewable
energies”energies”..

12. Potential EnergyPotential Energy
• The energy acquired by it byThe energy acquired by it by
the virtue of its position and anthe virtue of its position and an
energy which is readilyenergy which is readily
available for use.available for use.
• Potential energy is broadlyPotential energy is broadly
classified into two types : -classified into two types : -
1. Mechanical Potential Energy1. Mechanical Potential Energy
2.Electrical Potential Energy2.Electrical Potential Energy

13. Kinetic EnergyKinetic Energy
• It is defined to be anIt is defined to be an
energy by virtue of itsenergy by virtue of its
motion of an object.motion of an object.
• The kinetic energy ofThe kinetic energy of
an object is given byan object is given by
K.E – m v*v / 2K.E – m v*v / 2

14. Hydro EnergyHydro Energy
• Moving water is highlyMoving water is highly
energized. Thisenergized. This
can be used to rotatecan be used to rotate
the turbine tothe turbine to
produced electricity.produced electricity.
• Turbine contains aTurbine contains a
number of blades atnumber of blades at
the periphery.the periphery.

15. Wind PowerWind Power
• Wind with high speedWind with high speed
is also a source ofis also a source of
energy to rotate theenergy to rotate the
turbine.turbine.
• Wind power plant isWind power plant is
based on thisbased on this
concept.concept.

16. Solar powerSolar power
• Solar light or sun heatSolar light or sun heat
is used as the energyis used as the energy
source by the use ofsource by the use of
photovoltaic.photovoltaic.
• It is important type ofIt is important type of
renewable energy whichrenewable energy which
is used at a large scaleis used at a large scale
now-a-days.now-a-days.

17. For More VisitFor More Visit
www.studyhubz.comwww.studyhubz.com
A Power Point Presentation ByA Power Point Presentation By
Yogendra Singh ShekhawatYogendra Singh Shekhawat
B. Tech, Mechanical EngineeringB. Tech, Mechanical Engineering