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A wheel of radius 2m having 8 conducting...

A wheel of radius 2m having 8 conducting concentric spokes is rotating about its geometrical axis with an angular velocity of 10 rad/s in a uniform magnetic field of 0.2T perpendicular to its plane. The value of induced emf between the rim of the wheel and centre is ......... V

A

2

B

6

C

4

D

8

Text Solution

Verified by Experts

The correct Answer is:
C
`epsilon=1/2 B omegaR^2`
`epsilon=1/2xx0.2xx(10)(2)^2`
=0.1 x 4 x 10 =4 V
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