A circular coil of n turns and radius r ...

A circular coil of n turns and radius r carries a current I. The magnetic field at the centre is

`(mu_(0)i)/(2R)`

`(i)/(2c^(2)epsilon_(0)R)`

`(mu_(0)i)/(2piR)`

`(ic^(2))/(2epsilon_(0)R)`

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The correct Answer is:

a,b

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