Questions
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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Correct option is D
Induced emf between O and Q is12Bω2r2=Bω2r2=2BvrBut net induced emf in the ring will be zero. Hence no current flows in the ring.
Similar Questions
A rod closing the circuit shown in figure moves along a U shaped wire at a constant speed v under the action of the force F. The circuit is in a uniform magnetic field perpendicular to the plane. Calculate F if the rate of heat generation in the circuit is Q.
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