Electromagnetism Flashcard

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 material, usually iron.

Front

What material is commonly used as a core to enhance the strength of an electromagnet?

Back

Iron is commonly used as a core to enhance the strength of an electromagnet.

Front

How does the distance between two magnets affect their attractive force?

Back

The attractive force between two magnets decreases as the distance between them increases.

Front

What happens to the strength of a magnetic field in an electromagnet when you increase the number of wire turns?

Back

The magnetic field strength increases when you increase the number of wire turns in an electromagnet.

Front

What is the primary purpose of a generator?

Back

The primary purpose of a generator is to convert mechanical energy into electrical energy.

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 electromagnet, typically measured in teslas (T).

Front

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

Back

In an electromagnet, an electric current flowing through a wire creates a magnetic field around the wire.

Front

What effect does increasing the size of an iron core have on an electromagnet's strength?

Back

Increasing the size of an iron core increases the strength of the electromagnet.

Front

What is the formula for calculating the magnetic force between two magnets?

Back

The magnetic force can be calculated using the formula F = (k * |m1 * m2|) / r^2, where F is the force, k is a constant, m1 and m2 are the magnetic moments, and r is the distance between the magnets.

Front

What is the role of a solenoid in electromagnetism?

Back

A solenoid is a coil of wire that generates a magnetic field when an electric current passes through it, often used in electromagnets.