Electricity & Magnetism (R)

Front

What is an electromagnet?

Back

An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. Unlike permanent magnets, electromagnets can be turned on and off.

Front

How do electromagnets differ from regular magnets?

Back

Electromagnets can be turned off and on, their polarity can be reversed, and their strength can be changed.

Front

What is the charge of an electron?

Back

An electron carries a negative electric charge.

Front

What happens when like charges come close to each other?

Back

Like charges repel each other.

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 static electricity?

Back

Static electricity is the buildup of electric charge on the surface of objects, which can cause them to attract or repel each other.

Front

What is the principle of magnetic poles?

Back

Every magnet has two poles: a north pole and a south pole. Opposite poles attract, while like poles repel.

Front

What is the role of electric current in electromagnets?

Back

Electric current flowing through a wire creates a magnetic field around the wire, which can be intensified by coiling the wire.

Front

What is a magnetic field?

Back

A magnetic field is the region around a magnet where magnetic forces can be detected.

Front

What is the difference between conductors and insulators?

Back

Conductors allow electric current to flow easily, while insulators resist the flow of electric current.