Electromagnetism

Front

What is electromagnetism?

Back

Electromagnetism is the branch of physics that deals with the interaction between electric charges and magnetic fields.

Front

What is an electromagnet?

Back

An electromagnet is a type of magnet in which the magnetic field is produced by an electric current.

Front

How does electricity create a magnetic field?

Back

When an electric current flows through a wire, it generates a magnetic field around the wire.

Front

What is the relationship between current and magnetic strength in an electromagnet?

Back

As the electric current increases, the magnetic strength of the electromagnet also increases.

Front

What is a permanent magnet?

Back

A permanent magnet is a material that maintains a persistent magnetic field without the need for an external power source.

Front

How can you turn an electromagnet on and off?

Back

You can turn an electromagnet on and off by controlling the electric current flowing through it.

Front

What are the two poles of a magnet called?

Back

The two poles of a magnet are called the North pole and the South pole.

Front

What is the right-hand rule in electromagnetism?

Back

The right-hand rule is a mnemonic for understanding the direction of the magnetic field around a current-carrying wire.

Front

What is the formula for calculating the magnetic force on a charged particle?

Back

The magnetic force (F) on a charged particle is given by F = q(v × B), where q is the charge, v is the velocity, and B is the magnetic field.

Front

What is the difference between AC and DC current?

Back

AC (Alternating Current) changes direction periodically, while DC (Direct Current) flows in one direction.