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A conducting rod AC of length 4l is rota...

A conducting rod `AC` of length `4l` is rotated about point `O` in a uniform magnetic field `vec(B)` directed into the plane of the paper. `AO = l and OC = 3l`. Find `V_(A) - V_(C)`.

A

`V_A-V_O=(Bomegal^2)/2`

B

`V_A-V_C=7/2Bomegal^2`

C

`V_A-V_C=4Bomegal^2`

D

`V_C-V_O=9/2Bomegal^2`

Text Solution

Verified by Experts

The correct Answer is:
C
`V_O-V_A=1/2Bl^2omega`
`V_O-V_C=1/2B(3l)^2omega`
`:. V_A-V_C=4Bl^2omega`
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