Electromagnets and Electric Motors

Front

What is an electromagnet?

Back

An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. It consists of a coil of wire, often wrapped around a core of ferromagnetic material.

Front

What device is used to measure the strength of an electromagnet?

Back

Galvanometer.

Front

What is the function of the stator in an electric motor?

Back

The stator is the stationary part of the motor that creates a magnetic field.

Front

What type of current flows in a direct current (DC) motor?

Back

Electrical current that flows only in one direction.

Front

What is the role of the commutator in an electric motor?

Back

The commutator reverses the direction of the current in the motor.

Front

What energy conversion occurs in an electric motor?

Back

An electric motor converts electrical energy into mechanical energy.

Front

What is the rotor in an electric motor?

Back

The rotor is the rotating part of the motor that turns to produce mechanical motion.

Front

What is the relationship between electromagnet strength and the number of wire turns?

Back

Increasing the number of turns of wire in the coil increases the strength of the electromagnet.

Front

What is the principle behind the operation of an electric motor?

Back

An electric motor operates on the principle of electromagnetism, where a current-carrying conductor experiences a force in a magnetic field.

Front

What is the difference between AC and DC motors?

Back

AC motors operate on alternating current, while DC motors operate on direct current.