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A fan blade of length 1//sqrt(pi) metr...

A fan blade of length `1//sqrt(pi)` metre rotates with frequncy 5 cycle per second perpendicular to a magnetic field 10 tesla.
What is potential diffrence between the centre and the end of blade ?

A

`-50 V`

B

`+ 50V`

C

`-2.0 V`

D

`+ 0.02 V`

Text Solution

Verified by Experts

The correct Answer is:
A
`.^(V_(D))int_(V_(0)) de = - .^(a)int_(0) B "x"omega d"x"`
`V_(D) - V_(0) = - (1)/(2) Ba^(2) omega`
`= - (1)/(2) xx 10 xx 5 xx 2pi xx(1)/(pi) = - 50V`
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