# NEET Physics Moving Charges and Magnetism Questions Solved

A circular coil 'A'  has a radius R and the current flowing through it is I. Another circular coil ‘B’ has a radius 2R and if 2I is the current flowing through it, then the magnetic fields at the centre of the circular coil are in the ratio of (i.e. ${B}_{A}$ to ${B}_{B}$
(a) 4 : 1                             (b) 2 : 1
(c) 3 : 1                             (d) 1 : 1

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