11.22 Electromagnetism

Front

What is the phenomenon of inducing voltage by changing the magnetic field around a conductor called?

Back

Electromagnetic induction

Front

What is the relationship between electricity and magnetism called?

Back

Electromagnetism

Front

What is the unit of electric current?

Back

Ampere

Front

Which of the following materials is commonly used as a conductor of electricity?

Back

Copper

Front

Which of the following is a non-magnetic material?

Back

Plastic

Front

What is the term for the magnetic field produced by an electric current?

Back

Magnetic field

Front

What is Faraday's law of electromagnetic induction?

Back

The induced electromotive force in any closed circuit is equal to the rate of change of the magnetic flux through the circuit.

Front

What is the formula for calculating electric power?

Back

Power (P) = Voltage (V) × Current (I)

Front

What is the role of a transformer in an electrical circuit?

Back

A transformer changes the voltage level in an AC circuit.

Front

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

Back

An electric motor converts electrical energy into mechanical energy using the interaction of magnetic fields.