Chapter 24.2, Problem 34SSC

To determine

The way,a galvanometer is similar to an electric motor.

Explanation of Solution

Introduction:

A galvanometer is a device used to measure small electric currents. An electric current is a device which is used for converting electrical energy into mechanical energy.

A galvanometer uses a loop of wire placed between magnets similar to an electric field. When current passes through the loop it generates magnetic field and it interacts with the magnetic field present, generating torque and therefore moving the loop. In a galvanometer, the loop the wire only moves for a certain angle while in an electric motor the loop goes complete circle.

Conclusion:

In both the galvanometer and the motor, the current carrying wire moves under the influence of magnetic field. The difference is in the degree of rotation. Motor is free to rotate while the galvanometer is restricted.