Electric and Magnetic Forces Review

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 magnetic core.

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, using a larger magnetic core, using thicker wire, or increasing the voltage of the power source.

Front

What is static electricity?

Back

Static electricity is the buildup of electric charges on the surface of an object. It occurs when there is an imbalance between positive and negative charges.

Front

Which materials are magnetic?

Back

Magnetic materials include iron, cobalt, and nickel. Aluminum is NOT magnetic.

Front

What is the role of a magnetic core in an electromagnet?

Back

The magnetic core enhances the magnetic field produced by the coil of wire, making the electromagnet stronger.

Front

What happens when an electric current flows through a wire in a magnetic field?

Back

When an electric current flows through a wire in a magnetic field, it experiences a force that can cause it to move, which is the principle behind electric motors.

Front

What is the difference between an open circuit and a closed circuit?

Back

An open circuit has a break in the path, preventing current from flowing, while a closed circuit allows current to flow continuously.

Front

What is magnetism?

Back

Magnetism is a physical phenomenon produced by the motion of electric charge, resulting in attractive and repulsive forces between objects.

Front

What is the unit of electric current?

Back

The unit of electric current is the Ampere (A).

Front

What is the relationship between electricity and magnetism?

Back

Electricity and magnetism are interrelated; an electric current produces a magnetic field, and a changing magnetic field can induce an electric current.