NEET Physics Moving Charges and Magnetism Questions Solved


 The magnetic field at the centre of coil of n turns, bent in the form of a square of side 2 l , carrying current i, is

(a)  2μ0niπl                               (b)  2μ0ni2πl

(c)  2μ0ni4πl                                (d)  2μ0niπl

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