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A rectangular coil of 300 tums has an av...

A rectangular coil of 300 tums has an average area of `25 cmxx10cm`. The coil rotates with a speed of 50 cps in uniform magnetic field of strength `4xx10^(-2)` About an axis perpendicular to the field. The peak value of the induced emf is (in volt)

A

`300pi`

B

`3000pi`

C

`3pi`

D

`30pi`

Text Solution

Verified by Experts

The correct Answer is:
D
Induced emf in rectangular coil is given by e=nBA`Omegatheta`
=`300xx4xx10^(-2)xx25xx10xx10^(-4)xx2pixx50xxsin90^(@)`
=`30pixx10^(6)xx10^(-6)=30piV`.
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