Conside the case where the bar magnet is held motionless but the coil ismoved to

Question

Conside the case where the bar magnet is held motionless but the coil ismoved toward or away from the magnet. Predict what will be the reading by the voltage probe.

The reading of the voltage probe is the same in sign but of different magnitude to when the magnet was moving because coil covers more area thus the change of flux will be different The reading of the voltage probe is the same in magnitude but opposite in sign to when the magnet was moving if relative the same The reading of the voltage probe is the same regardless if the magnet or the coil are moving as long as the relative motion is the same The reading of the voltage probe is zero compared to when the magnet was moving because the coil doesn't produce a magnetic field and thus there is no change of flux The reading of the voltage probe is different in both the sign and the magnitude to when the magnet was moving even if relative velocities are the same

Explanation / Answer

Here ,

the bar magnet is held motionless but the coil ismoved toward or away from the magnet.

as the flux through the coil changes when the coil is moved with respect of the bar magnet.

the sign of voltage when the coil is moved towards the magnet is same when the magnet is moved towards the loop.

hence , the correct option is

III) the readings of the voltage probe is same regradless if the magnet or the coil is moving as long as the relative motio is same

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