Question

In a moving coil galvanometer a radial magnetic field is applied with concave magnetic poles, to have
A) uniform magnetic field
B) the plane of the coil parallel to field
Choose the correct option among the following

• A. both A and B are true
• B. both A and B false
• C. A is true , B is false
• D. A is false, B is true

Answer 1

The correct option is A both A and B are true

In moving coil galvanometer a radial magnetic field is applied with concave magnetic poles, to have uniform magnetic field.

Since the magnified field is radial the plane of the coil is parallel to the magnetic field $\overrightarrow{B}$ such that $\theta$ $={90}^o$ and hence $\tau =NIBA$.

The plane of coil is parallel to the field.