Question

2. If the field is radial, then the angle between magnetic moment
of galvanometer coil and the magnetic field will be
(a) 0°
(b) 30°
(c) 60° (d)90°​

Answer 1

Answer: 60°

Explanation:

If the field is radial, then the angle between magnetic moment of galvanometer coil and the magnetic field will be 60°

Answer 2

Answer:

The angle between the magnetic moment of the galvanometer coil and the magnetic field must be 90°.

Explanation:

• The electromagnetic device that measures the small current value is said to be the moving coil galvanometer.

• The galvanometer is made up of a permanent horseshoe magnet.

• A field that consists of radii field lines radiating from the center is called a radial field.

• The radial field can be seen in point charges, spheres, and masses.

• To produce a constant torque on the coil of the moving coil galvanometer, a radial field is applied to it.

• A radial magnetic field helps maintain the angle between the plane and the magnetic field to zero.

Thus, in the radial magnetic field, the angle between the magnetic moment of the galvanometer coil and the magnetic field must be 90° to ensure the proportionality between the current(I) and angular deflection (ϕ) of the coil in equilibrium position.