one of the following sts is a coect epresentation of electromagnetic wavers from low to high A) radio waves infrared, X-rays,microwaves UV, visible, gamma rays B) radio waves, UV, X-rays, microwaves, infrared, visible, gamma rays C) radio waves, infrared, microwaves D) radio waves, microwaves, visible, X-rays, infrared, UV E) radio waves, microwaves, infrared, visible, UV, x-rays gamma rays UV, visible, X-rays gamrna rays ays ,gammar 2) A loop is being pulled to the left out of a magnetic field as shown in the diagram below. What is the direction of the induced current in the loop? A) clockwise B) counterclockwise C) no current 3) The primary coil of a transformer has 100 turns and its secondary coil has 400 turns. If the ac voltage applied the primary coil is 120 V, what voltage is present in its secondary coil? E) 70V B) 30 V C) 480 V D) 100 V A) 400 V 4) Which of the following statements is true? L. Gauss\'s Law is used to calculate the Electric field due to charges. II. Ampere\'s Law is used to calculate the Magnetic field due to currents. IL. Bo th Ampere\'s Law and Gauss\'s Law are always true, but are only useful for calculating fields for sy E) I an situations. C) 11 D) Il and II A) I II and III B) I 5) A positive charge will move A) from low potential to high potential, in the direction of the Electric field. B) from high potential to low potential, in the direction of the Electric field C) from high potential to low potential, opposite the direction of the Electric field. D) from low potential to high potential, opposite the direction of the Electric field Solution Q2. as the loop is being pulled out of the magnetic field, flux linking the loop is decreasing. hence using lenz’s law, induced current should be such that it is in opposite direction of the cause of the induction of current. hence current is counter clockwise in direction. Q3. primary voltage/secondary voltage=primary turns/secondary turns ==>120/secondary voltage=100/400 ==>secondary voltage=480 volts hence option C is correct. Q4. all the statements are true hence option A is correct. Q5. electric field is from high potential to lower potential. force on charge=charge on electric field so a positive charge will experience force along the field and move along the field hence option B is correct. .

1. one of the following sts is a coect epresentation of electromagnetic wavers from low to high A)
radio waves infrared, X-rays,microwaves UV, visible, gamma rays B) radio waves, UV, X-rays,
microwaves, infrared, visible, gamma rays C) radio waves, infrared, microwaves D) radio waves,
microwaves, visible, X-rays, infrared, UV E) radio waves, microwaves, infrared, visible, UV, x-
rays gamma rays UV, visible, X-rays gamrna rays ays ,gammar 2) A loop is being pulled to the
left out of a magnetic field as shown in the diagram below. What is the direction of the induced
current in the loop? A) clockwise B) counterclockwise C) no current 3) The primary coil of a
transformer has 100 turns and its secondary coil has 400 turns. If the ac voltage applied the
primary coil is 120 V, what voltage is present in its secondary coil? E) 70V B) 30 V C) 480 V D)
100 V A) 400 V 4) Which of the following statements is true? L. Gauss's Law is used to
calculate the Electric field due to charges. II. Ampere's Law is used to calculate the Magnetic
field due to currents. IL. Bo th Ampere's Law and Gauss's Law are always true, but are only
useful for calculating fields for sy E) I an situations. C) 11 D) Il and II A) I II and III B) I 5) A
positive charge will move A) from low potential to high potential, in the direction of the Electric
field. B) from high potential to low potential, in the direction of the Electric field C) from high
potential to low potential, opposite the direction of the Electric field. D) from low potential to
high potential, opposite the direction of the Electric field
Solution
Q2.
as the loop is being pulled out of the magnetic field, flux linking the loop is decreasing.
hence using lenz’s law, induced current should be such that it is in opposite direction of the
cause of the induction of current.
hence current is counter clockwise in direction.
Q3.
primary voltage/secondary voltage=primary turns/secondary turns
==>120/secondary voltage=100/400
==>secondary voltage=480 volts

2. hence option C is correct.
Q4.
all the statements are true
hence option A is correct.
Q5. electric field is from high potential to lower potential.
force on charge=charge on electric field
so a positive charge will experience force along the field and move along the field
hence option B is correct.