Question

In moving coil galvanometer, strong horse shoe magnet of concave shaped pole pieces is used to ______.

Options

• increase space for rotation of coil

• reduce weight of galvanometer

• produce magnetic field which is parallel to plane of coil at any position

• make magnetic induction weak at the centre.

Answer 1

In moving coil galvanometer, strong horse shoe magnet of concave shaped pole pieces is used to produce magnetic field which is parallel to plane of coil at any position.

Explanation:

The pole-pieces of the horseshoe magnet are cylindrically concave. The magnet produces a radial magnetic field as a result of its shape, and the coil's plane is always parallel to the magnetic field's direction as it rotates in any position. This is seen in the diagram below.