# GEOLOGY

## EARTH SCIENCE

### MAGNETISM

 Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
what is one difference between a galvanometer and an electric motor
 A In a electric motor a armature spins continually B the electric motor only spins some times C Either A or B D None of the above
Explanation:

Detailed explanation-1: -Expert-Verified Answer. An electric motor is a machine that is responsible for conversion of electrical energy to mechanical energy. On the other hand a galvanometer is an electrical tool that is used to measures small values of current.

Detailed explanation-2: -Differences: The coil in a galvanometer can only rotate through 180∘, whereas the coil in an electric motor can rotate through 360∘. There is no split-ring commutator present in a galvanometer but it is present in an electric motor.

Detailed explanation-3: -Galvanometer is a device which is used to check the presence of current in a circuit. Ammeter is a device which shows the amount of electric current in a circuit. Motor is a device which converts electrical energy into mechanical energy.

Detailed explanation-4: -The galvanometer and electric motor are similar in that they both use the principle of the resulting magnetic and electrical force to mechanically move and convert electrical to mechanical energy.

Detailed explanation-5: -Current always flows from the positive to the negative terminal of a battery. The current in the armature is reversed each time the commutator moves to a different brush. This causes the armature to rotate continuously.

There is 1 question to complete.