Question

The magnitude of the electromotive force (emf) produced by a moving magnetic field in a coil...

The magnitude of the electromotive force (emf) produced by a moving magnetic field in a coil is dependent on which of the following factors? Select all that apply.

1 speed of the magnetic field
2 acceleration of the magnetic field
3 mass of the magnet
4 size of the coil
5 number of loops in the coil
6 the polarity of the magnetic field
7 the strength of the magnetic field
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Answer #1

The emf induced is given by

Where

Hence, the induced emf depends on

*Size of the coil ( cross sectional area ,A)

*Number of loops in the cpil, N

* Strength of the magnetic field

The polarity will only affect the direction of the emf, not the magnitude. Besides, the speed and acceleration are not responsible, as we consider he change in the magnetic flux which speaks about the change in magnetic field or area.

The size of the magnet does not matter in any way. Since, it is the magnetic strength which defines a magnet, not its shape or size

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