8.3 Forces at a Distance

Front

What happens when the direction of the current in an electromagnet is changed?

Back

The poles of the electromagnet are flipped.

Front

Can magnets repel other magnets?

Back

Yes, magnets can repel other magnets.

Front

What is the outcome when two north poles of magnets are brought together?

Back

The two north poles will repel each other.

Front

What is the effect in the hypothesis: 'When we bring another piece of iron near the doorbell's hammer arm, then we will observe no forces between them if the doorbell's hammer arm is made of iron'?

Back

No forces between them.

Front

What is the definition of magnetic repulsion?

Back

Magnetic repulsion occurs when two like poles of magnets (north-north or south-south) push away from each other.

Front

What is the definition of magnetic attraction?

Back

Magnetic attraction occurs when opposite poles of magnets (north-south) pull towards each other.

Front

What materials can be attracted by magnets?

Back

Magnets can attract materials made of iron, nickel, and cobalt.

Front

What is a permanent magnet?

Back

A permanent magnet is a material that maintains a persistent magnetic field without the need for an external power source.

Front

What is an electromagnet?

Back

An electromagnet is a type of magnet in which the magnetic field is produced by an electric current.

Front

What is the role of electric current in an electromagnet?

Back

Electric current creates a magnetic field around the wire, which can be turned on or off.