A metallic ring (radius R ) of negligible resistance has a resistance r connected across its diameter as shown in the figure. It is moving with velocity v 0 in a constant magnetic field B 0 acting per

Question

A metallic ring (radius R ) of negligible resistance has a resistance r connected across its diameter as shown in the figure. It is moving with velocity v 0 in a constant magnetic field B 0 acting perpendicular to the plane of the paper in the inward direction. The current in the resistance is:

TestHub · Accepted Answer

As induced emf is B l v for a moving rod, ∴ the arcs produce of emf of 2 B 0 v 0 R Applying KVL in the loop We get, 2 B 0 v 0 R = i r i = 2 B 0 v 0 R r

Physics - EMI/AC Question with Solution | TestHub

Options:

Doubts & Discussion