A small circular coil with identical turns and radius is concentric with a larger…

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

Problem

A small circular coil with N=20N = 20 identical turns and radius 2.0 cm2.0\,\text{cm} is concentric with a larger single-turn loop of radius 6.0 cm6.0\,\text{cm}. Both loops lie in the same plane. The larger loop carries a current of 10 A10\,\text{A} that is clockwise when viewed from above. What magnitude and direction of current must flow in the small coil so that the net magnetic field at the common center is zero? (a) 1.5 A1.5\,\text{A} counter-clockwise (b) 0.17 A0.17\,\text{A} counter-clockwise (c) 0.17 A0.17\,\text{A} clockwise (d) 3.3 A3.3\,\text{A} counter-clockwise

Related theory

Browse the problem library