PHY 102 TEST 2025/2026 QUESTIONS AND SOLUTIONS
MARKED A+
✔✔The earth has a magnetic field - ✔✔True
✔✔Like kinds of magnetic poles repel while unlike kinds of magnetic poles - ✔✔attract
✔✔If you cut a bar magnet in half, you will get a magnet that is only a north pole and a
magnet that is only a south pole. - ✔✔false
✔✔A device that transforms mechanical energy into electrical energy is a -
✔✔generator
✔✔Rapid change of a magnetic field induces - ✔✔an electric field
✔✔Electromagnetic induction occurs in a coil when there is a change in - ✔✔magnetic
field intensity in the coil
✔✔A compass is placed close to a stationary charge. If the charge remains stationary,
the compass will not deflect, but if the charge moves, the compass will deflect. -
✔✔True
✔✔In an induction stove, the surface of the stove heats up. - ✔✔False
✔✔The input current of a transformer is 4 A. The primary coil has 50 loops and the
secondary has 25 loops. The current that the transformer puts out is - ✔✔8A
✔✔A device that transforms electrical energy to mechanical energy is a - ✔✔motor
✔✔Which of the following does not use a generator to produce electricity? - ✔✔solar
panel
✔✔Electromagnetic induction was discovered by - ✔✔Michael Faraday
✔✔The amplitude of a particular wave is 1 meter. The top-to-bottom distance of the
disturbance is - ✔✔2 m
✔✔An object that completes 20 vibrations in 10 seconds has a frequency of - ✔✔2
hertz
✔✔If you simultaneously send pulses of high frequency X-rays and low frequency radio
waves from the earth to the moon, both waves will arrive at exactly the same time
(assuming a vacuum between earth and moon). - ✔✔True
MARKED A+
✔✔The earth has a magnetic field - ✔✔True
✔✔Like kinds of magnetic poles repel while unlike kinds of magnetic poles - ✔✔attract
✔✔If you cut a bar magnet in half, you will get a magnet that is only a north pole and a
magnet that is only a south pole. - ✔✔false
✔✔A device that transforms mechanical energy into electrical energy is a -
✔✔generator
✔✔Rapid change of a magnetic field induces - ✔✔an electric field
✔✔Electromagnetic induction occurs in a coil when there is a change in - ✔✔magnetic
field intensity in the coil
✔✔A compass is placed close to a stationary charge. If the charge remains stationary,
the compass will not deflect, but if the charge moves, the compass will deflect. -
✔✔True
✔✔In an induction stove, the surface of the stove heats up. - ✔✔False
✔✔The input current of a transformer is 4 A. The primary coil has 50 loops and the
secondary has 25 loops. The current that the transformer puts out is - ✔✔8A
✔✔A device that transforms electrical energy to mechanical energy is a - ✔✔motor
✔✔Which of the following does not use a generator to produce electricity? - ✔✔solar
panel
✔✔Electromagnetic induction was discovered by - ✔✔Michael Faraday
✔✔The amplitude of a particular wave is 1 meter. The top-to-bottom distance of the
disturbance is - ✔✔2 m
✔✔An object that completes 20 vibrations in 10 seconds has a frequency of - ✔✔2
hertz
✔✔If you simultaneously send pulses of high frequency X-rays and low frequency radio
waves from the earth to the moon, both waves will arrive at exactly the same time
(assuming a vacuum between earth and moon). - ✔✔True
