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Q.

A conducting rod of length 2l is rotating with constant angular speed ω about its perpendicular bisector. A uniform magnetic field B→ exists parallel to the axis of rotation. The e.m.f. induced between two ends of the rod is

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a

Bωl2

b

12Bωl2

c

18Bωl2

d

Zero

answer is D.

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Detailed Solution

Potential difference between O and A isV0-VA=12Bl2ωPotential difference between O and B isVo-VB=12Bl2ω so VA-VB=0
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