In ballistic galvanometer, the frame on which the coil is wound is non-metallic. It is

In a ballistic galvanometer the deflection is proportional to

Moving Coil Galvanometer

In a moving coil galvanometer is based on the

In a moving coil galvanometer is based on the

A small cylindrical magnet M (Fig) is placed in the centre of a thin coil of radius a consisting of N turns. The coil in connected to a ballistic galvanometer. The active resistance of the whole circuit is equal to R . Find the magnetic moment of the magnet if its removel from the coil results in a charge q flowing through the galvanometer.

In the dead beat galvanometer, the coil is wound on a frame made of :