A long straight cylindrical hollow pipe has inner and outer radii 1 cm and 2 cm respectively.
Channel: Doubtnut
Date: 2020-08-30

A long straight cylindrical hollow pipe has inner and outer radii 1 cm and 2 cm respectively. It carries  a current 100 A. Calculate the magnetic field at distance (a) 0.5 cm, (b) 1.5 cm and (c) 4 cm from the axis of pipe.