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A coil having effective area A is held w...

A coil having effective area A is held with its plane normal to a magnetic field of induction B. The magnetic induction is quickly reduced of `25%` of its initial value in 1s. The e.m.f. Induced across the coil will be

A

`(AB)/(4)V`

B

`(AB)/(2)V`

C

`(3AB)/(4)V`

D

`(3AB)/(8)V`

Text Solution

Verified by Experts

The correct Answer is:
C
`e= (d phi)/(dt) = A(d B)/(dt) = A3/4 B/1`
`:. e = (3AB)/4 V ( :' dB=3/4 B)`.
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MARVEL PUBLICATION-ELECTROMAGNETIC INDUCTION AND ALTERNATING CURRENTS -TEST YOUR GRASP - 16
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