Q.

A magnet is brought towards a coil (i) speedly (ii) slowly then the induced e.m.f./induced charge will be respectively

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a

More in first case / More in first case

b

More in first case/Equal in both case

c

Less in first case/Equal in both case

d

Less in first case/More in second case

answer is B.

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Detailed Solution

The magnitude of induced e.m.f. is directly proportional to the rate of change of magnetic flux. Induced charge doesn’t depend upon time. 

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A magnet is brought towards a coil (i) speedly (ii) slowly then the induced e.m.f./induced charge will be respectively