Electromagnet Flashcard 2022

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

How can you increase the strength of an electromagnet?

Back

You can increase the strength of an electromagnet by increasing the number of coils of wire, increasing the electric current, or using a better core material.

Front

What is the role of electrons in electricity?

Back

Electrons are negatively charged particles that flow through conductors to create electric current.

Front

What materials are attracted to magnets?

Back

Materials that are attracted to magnets include iron, nickel, and cobalt.

Front

What is the Earth's magnetic field?

Back

The Earth's magnetic field is a magnetic field that extends from the Earth's interior out into space, affecting compass needles and protecting the planet from solar wind.

Front

What happens to a compass needle when it is near a magnet?

Back

A compass needle will align itself with the magnetic field of the magnet, pointing towards the magnet's north pole.

Front

What is the difference between a permanent magnet and an electromagnet?

Back

A permanent magnet produces a constant magnetic field without the need for electricity, while an electromagnet's magnetic field can be turned on or off and can be adjusted in strength.

Front

What is magnetic field strength?

Back

Magnetic field strength is a measure of the intensity of the magnetic field produced by a magnet or an electromagnet, often measured in teslas (T).

Front

What is the right-hand rule in electromagnetism?

Back

The right-hand rule is a mnemonic used to determine the direction of the magnetic field around a current-carrying conductor: if you point your thumb in the direction of the current, your fingers will curl in the direction of the magnetic field.

Front

What is the significance of the north and south poles of a magnet?

Back

The north and south poles of a magnet are the points where the magnetic force is strongest. Opposite poles attract each other, while like poles repel.