PHYSICS · Multi-part · CBSE · Physics · Moving Charges and Magnetism · Moving Charges and Magnetism
Problem
Two identical circular loops A and B, each of radius R, are arranged coaxially with their centres R apart. Loop A carries a current I clockwise when viewed from above, while loop B carries the same current I anticlockwise.
(i) State the direction of the magnetic field produced by loop A at the midpoint of the line joining the two centres.
(ii) State the direction of the magnetic field produced by loop B at the same point.
(iii) Hence determine the direction and relative magnitude (zero, equal to one loop, or double) of the net magnetic field at the midpoint. Justify your answer briefly.