1.

A flat coil of area A and n turns is placed at the centre of a ring of radius r (r2 >> A) and resistance R. The coil and the ring are coplanar. When the current in the coil increases from zero to i, the total charge circulating in the ring is(a) μ0nAi/2rR(b) μ0nAi/r2R(c) μ0nAi/2πr(d) μ0n2i/2πrR

Answer»

Correct Answer is: (a) μ0nAi/2rR



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