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A conducting rod PQ of length `4l` is rotated about a point O in a uniform magnetic field `vecB . PO=l` Then
image
Options:
(a) `V_Q-V_P=(Bomegal^2)/2` (b) `V_Q-V_O=5/2Bomegal^2`
(c) `V_Q-V_O=9/2Bomegal^2` (d) `V_A-V_Q=4Bomegal^2`

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