Embibe Experts Solutions for Chapter: Matter and Magnetism, Exercise 3: Exercise-3

A rectangular coil of $100$ turns has length $4 \mathrm{cm}$ and width $5 \mathrm{cm}.$ It is placed with its plane parallel to a uniform magnetic field and a current of $2 A$ is sent through the coil. Find the magnitude of the magnetic field $B,$ if the torque acting on the coll is $0.2 \mathrm{N}-\mathrm{m}.$.