A bicycle is resting on its stand in the...

A bicycle is resting on its stand in the east-west direction and the rear wheel is rotated at an angular speed of `50` revolutions per minute.If the length of each spoke is `30.0 cm` and the horizontal component of the earth's magnetic field is `4xx10^(-5) T`,find the `emf` induced between the axis and the outer end of a spoke Neglect centripetal force acting on the free electrons of the spoke.

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The correct Answer is:

A, C, D

`epsilon=1/2BomegaL^(2) =4xx10^(-5)xx[pixx(30xx10^(-2))^(2)]xx50/60`

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