As shown in the figure, a magnet is moved from A to B with some speed towards a coil at rest. Due to this induced electromotive force, induced current and induced charge in the coil are E,I and Q respectively. If the speed of the magnet would have been doubled, the incorrect statement is

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Q remains same

E increases

I increases

Q increases

answer is D.

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Detailed Solution

Given data:

Induced emf=e

Charge=q

Current=i

Concepts used: Magnetic flux density

Explanation:

As the time rate of flux change increases, both the induced emf and current increase. However, the induced charge is independent of time. So it stays the same. Therefore, the charge remains the same and e and I increase.

The correct option is D

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