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Q.

A conducting rod AC of length 3L is rotated with angular velocity ω as shown in diagram about a point O in a uniform magnetic field B directed into the paper. AO = L and OC = 2L. Then 

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a

VA−VC=52BωL2

b

VO−VC=2BωL2

c

VA−VC=32BωL2

d

Both 2 and 3

answer is D.

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Detailed Solution

V0=0,VA=−BωL22;  VB=Bω2L22

VA−VC=3BωL22 ; VO−VC=2BωL2

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