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A solenoid of 2000 turns is wound over a...

A solenoid of 2000 turns is wound over a length of 0.3 m. The area aof cross section is `1.3 xx 10^(-3) m^(2)`. Around its central seciton, a coil of 300 turns is closely wound. If an initial current of 2 A is reversed in 0.25 s, find the e.m.f induced in the coil .

A

`6 xx 10^(-4)V`

B

`4.8 xx 10^(-2) V`

C

` 2.4 xx 10^(-2) v`

D

48kV

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The correct Answer is:
B
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