An electric current is flowing through a circular coil of radius

PHYSICS · Single correct · CBSE · Physics · Moving Charges and Magnetism · Moving Charges and Magnetism

Problem

R

. The ratio of the magnetic field at the centre of the coil and that at a distance

2\sqrt{2}R

from the centre of the coil and on its axis is: (1)

2\sqrt{2}

(2) 27 (3) 36 (4) 8