The radius of the circular conducting loop shown in figure is R . Magnetic field is decreasing at a constant rate α . Resistance per unit length of the loop is ρ . Then current in wire A B is ( A B is one of the diameters)

Question

The radius of the circular conducting loop shown in figure is R . Magnetic field is decreasing at a constant rate α . Resistance per unit length of the loop is ρ . Then current in wire A B is ( A B is one of the diameters), 2 ρ R α ​ from B to A, 2 ρ R α ​ from A to B, ρ 2 R α ​ from A to B, zero

MARKS App · Accepted Answer

As per Lenz's law, e.m.fs of the same magnitude are induced in the two loops in the clockwise direction. Thus current is induced

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