A long cylindrical conductor of radius a has two cylindrical cavities of diameter
Channel: Doubtnut
Date: 2020-07-12

A long cylindrical conductor of radius a has two cylindrical cavities of diameter a through its entire length as shown in cross-section in figure. A current `I` is directed out of the page and is uniform throughout the cross-section of the conductor. Find the magnitude and direction of the magnetic field in terms of `mu_0,I,r` and a.  (a) at point `P_1` and (b) at point `P_2`