Lesson 4 Electromagnetism

Front

What is the shape of the magnetic field around a current-carrying wire?

Back

The magnetic field forms closed circles around the wire.

Front

How is electric current produced in a generator?

Back

Electric current is produced by rotating wire coils through a magnetic field.

Front

What can electric currents create in relation to magnetism?

Back

Electric currents can create magnetic fields.

Front

In which direction does the current produced by a battery flow in a circuit?

Back

The current flows in only one direction.

Front

What type of field forms around a charged particle?

Back

A magnetic field forms around a charged particle.

Front

What is electromagnetism?

Back

Electromagnetism is the interaction between electricity and magnetism, where electric currents can produce magnetic fields.

Front

What happens to the magnetic field when the current in a wire is increased?

Back

The strength of the magnetic field increases.

Front

What is a permanent magnet?

Back

A permanent magnet is a material that produces a magnetic field without the need for an electric current.

Front

What is the role of a magnetic field in a motor?

Back

The magnetic field interacts with electric currents to produce motion in a motor.

Front

What is the difference between alternating current (AC) and direct current (DC)?

Back

AC changes direction periodically, while DC flows in only one direction.