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Q.

As shown in the figure, a magnet is moved with fast speed towards a coil at rest. Due to this induced electromotive force, induced current and induced charge in the coil is E, I and Q, respectively. If the speed of the magnet is doubled, then find the incorrect option from the following.

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a

I increases

b

Q increases

c

Q remains same

d

E increases

answer is D.

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Detailed Solution

Induced charge doesn't depend upon the speed of magnet.

dQ=idt=εRdt=dϕR

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