Question

Give the principle of moving coil galvanometer? What is the advantage of radial magnetic field in the galvanometer?

Answer 1

Torque acts on a current carrying coil suspended in the uniform magnetic field. due to this, the coil rotates.

Hence, the deflection in the coil of a moving coil galvanometer is directly proportional to the current flowing in the coil.

And the advantage of radial magnetic field in the galvanometer are

$-$ Maximum Torque is experienced

$-$ Torque is uniform for all the position of the coil.