Galvanometer:
1. An electromechanical instrument, which is used to detect the presence of current in a circuit is known as galvanometer.
2. The major parts of a galvanometer are following.
a. U-shaped magnet whose north and south poles are made concave
b. Rectangular coil made by winding insulated copper wire on a non magnetic material.
c. A suspended strip to hold the coil.
d. Soft iron core
e. Spiral spring
f. Scale, pointer and a source of light.