Question

Moving coil galvanometer operates on Permanent Magnet Moving Coil (PMMC) mechanism.

Moving coil galvanometers are of two types
(a) Suspended coll
(b) Pivoted coil type or tangent galvanometer,

Its working is based on the fact that when a current carrying coil is placed in a magnetic field, it experiences a torque. This torque tends to rotate the coil about its axis of suspension in such a way that the magnetic flux passing through the coil is maximum.

$\left(ii\right)$ To make the field radial in a moving coil galvanometer

• A. number of turns of coil is kept small
• B. magnet is taken in the form of horse-shoe
• C. poles are of very strong magnets
• D. poles are cylindrically cut

Answer 1

The correct option is D poles are cylindrically cut

Uniform field in between permanent poles is made radial by cutting poles cylindrically