Electromagnets and Magnetism

Front

What is the force around a magnet called?

Back

Magnetism

Front

Does the Earth produce its own magnetic field? (True/False)

Back

True

Front

How can you turn an electromagnet on or off?

Back

By controlling the electric current that passes through it.

Front

What is magnetism?

Back

A force that either attracts or repels certain materials.

Front

What is required to form an electromagnet?

Back

An electric current must pass through a coil of wire wrapped around an iron core.

Front

What are the two poles of a magnet called?

Back

North pole and South pole.

Front

Can magnets attract all materials?

Back

No, magnets only attract certain materials like iron, nickel, and cobalt.

Front

What happens when you break a magnet in half?

Back

You create two smaller magnets, each with a North and South pole.

Front

What is an example of an everyday use of electromagnets?

Back

Electric bells, magnetic locks, and MRI machines.

Front

What is the difference between a permanent magnet and an electromagnet?

Back

A permanent magnet maintains its magnetism, while an electromagnet can be turned on and off.