Question

The non-magnetic frame of a moving coil galvanometer is made of aluminium, and its function is to provide:

Options

• insulation between coil turns

• eddy current damping

• the restoring torque

• the radial magnetic field

Answer 1

The coil is wound on a non-magnetic aluminium frame. As the coil rotates, eddy currents induced in the frame oppose the motion, providing eddy current damping (used in the pivoted Weston type).