Two identical circular loops, P and Q, each of radius r and carrying currents I and 2I respectively are lying in parallel plans such that they have a common axis.
The direction of current in both the loops is clockwise as seen from center . Find the magnitude of the net magnetic field at the center.
Please refer the following link: https://s3mn.mnimgs.com/img/shared/board_paper_solutions/2012/CBSE/XIIScience/2012_CBSE_XIIScience_4_1_SET2_sectionB.pdf?1331966631
(Question number 16)