A moving coil galvanometer consists of a coil of N turns are area A suspended
Channel: Doubtnut
Date: 2020-03-29

A moving coil galvanometer consists of a coil of N turns are area A suspended by a thin phosphor bronze strip in radial magnetic field B. The moment of inertia of the coil about the axis of rotation is l and c is the torsional constant of the phosphor bronze strip. When a current i is passed through the coil, it deffects through an angle `theta` When a charge Q is almost instantly through the coil the angular speed `omega` acquired by the coil is