A conducting ring of radius r and resistance R rolls on a horizontal surface with constant velocity v. The magnetic field B is uniform and is normal to the plane of the loop. Choose the correct option.
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a
The induced emf between O and Q is Brv.
b
An induced current I = 2Bvr/R flows in the clockwise direction.
c
An induced current I = 2Bvr/R flows in the anticlockwise direction.
d
No current flows.
answer is D.
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Detailed Solution
Induced emf between O and Q is12Bω(2r)2=Bω2r2=2BvrBut net induced emf in the ring will be zero. Hence no current flows in the ring.
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A conducting ring of radius r and resistance R rolls on a horizontal surface with constant velocity v. The magnetic field B is uniform and is normal to the plane of the loop. Choose the correct option.