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Questions  

A conducting rod AC of length 4l is rotated about a point O in a uniform magnetic field B directed into the paper. AO = l and OC = 3l. Then

a
VA-VO=Bωl22
b
VO-VC=72Bωl2
c
VA-VC=4Bωl2
d
VC-VO=92Bωl2

detailed solution

Correct option is C

By using, e=12Bl2ωFor part AO ; eOA=eO-eA=12Bl2ωFor part OC; eOC=eO-eC=12B(3l)2ω∴eA-eC=4Bl2ω

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A uniform conducting rod of length l is rotating with uniform angular velocity ω about point P in uniform magnetic field B as shown. Calculate VP – VQ.


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