Magnetism

What are the two poles of a magnet?

North and South

What happens when two like magnetic poles are brought close together?

They repel

What happens when a north magnetic pole is brought near a south magnetic pole?

They attract

What is a magnetic field?

A region around a magnet or current-carrying conductor where magnetic effects can be detected

Outside a magnet, magnetic field lines are conventionally shown traveling in which direction?

From the north pole toward the south pole

Which of the following materials is strongly attracted to a magnet?

Iron

Which of the following is a ferromagnetic material?

Iron

What happens around a conductor when electric current flows through it?

A magnetic field forms around the conductor

What is electromagnetism?

The relationship between electricity and magnetism, including magnetic fields produced by electric current

What is one way to increase the strength of an electromagnet?

Increase the current through the coil

Why is wire commonly wound into a coil when creating an electromagnet?

The magnetic fields produced by the turns reinforce one another

What is commonly placed inside a coil to make an electromagnet stronger?

Ferromagnetic core, such as soft iron

What is the Right-Hand Rule commonly used to determine for a current-carrying conductor?

The direction of the magnetic field

Which electrical device commonly depends on electromagnetism for its operation?

Relay

Why is magnetism important in electrical technology?

Many devices such as motors, generators, transformers, relays, and solenoids depend on electromagnetic principles