A tightly wound 200-turn circular coil of radius $20 \mathrm{~cm}$ carries a current of $3.5 \mathrm

Question

A tightly wound 200-turn circular coil of radius $20 \mathrm{~cm}$ carries a current of $3.5 \mathrm{~A}$. The magnitude of the magnetic field at the centre of the coil is nearly (Take permeability of free space as $4 \pi 	imes 10^{-7} \mathrm{~T \cdot m/A}$)

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(c) :