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When a wheel with metal spokes 1.2 m lon...

When a wheel with metal spokes 1.2 m long rotates in a magnetic field of flux density ` 5 xx 10^(-5)` T normal to the plane of the wheel, an e.m.f. of `10^(-2)` V is induced between the rim and the axle. Find the rate of rotation of the wheel.

A

44 rps

B

88 rps

C

22 rps

D

11 rps

Text Solution

Verified by Experts

The correct Answer is:
A
`e=Bpir^(2)f`
`therefore f=(e)/(Bpir^(2))=(10^(-2))/(5xx10^(-5)xx3.14xx1.44)`
`f=44`rps.
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