A flat coil of area A and n turns is placed at the centre of a ring fo radius r(r^(2)gtgtA)and resistance R. The coil and the ring are coplaner. When the current in the coil increases from zero to i , the total charge circulating in the ring is

A flat coil of area A and n turns is placed at the centre of a ring fo

1.	A flat coil of area A and n turns is placed at the centre of a ring fo radius r(r^(2)gtgtA)and resistance R. The coil and the ring are coplaner. When the current in the coil increases from zero to i , the total charge circulating in the ring is
Answer» `(mu_(0)nAi)/(2rR)` `(mu_(0)nAi)/(R^(2)R)` `(mu_(0)nAi)/(2piR)` `(mu_(0)n^(2)i)/(4pirR)` ANSWER :A

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A flat coil of area A and n turns is placed at the centre of a ring fo radius r(r^(2)gtgtA)and resistance R. The coil and the ring are coplaner. When the current in the coil increases from zero to i , the total charge circulating in the ring is

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