Magnets Flashcard

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 can be turned on and off by controlling the electric current.

Front

What materials are attracted to magnets?

Back

Materials like iron, nickel, and cobalt are attracted to magnets.

Front

What is the main difference between permanent magnets and temporary magnets?

Back

Permanent magnets retain their magnetism once magnetized, while temporary magnets only exhibit magnetism when in the presence of a magnetic field.

Front

Can you give an example of a common use of magnets in everyday life?

Back

Refrigerator doors use magnets to stay closed.

Front

Name a material that is not attracted to magnets.

Back

Wood is not attracted to magnets.

Front

What is a permanent magnet?

Back

A permanent magnet is a magnet that retains its magnetism over time without the need for an external power source.

Front

What is a temporary magnet?

Back

A temporary magnet is a magnet that only exhibits magnetic properties when in the presence of a magnetic field.

Front

What is the role of electric current in an electromagnet?

Back

Electric current creates a magnetic field in an electromagnet.

Front

What happens to an electromagnet when the electric current is turned off?

Back

When the electric current is turned off, the magnetic field disappears, and the electromagnet loses its magnetism.

Front

What are some common materials used to make permanent magnets?

Back

Common materials for permanent magnets include iron, cobalt, and neodymium.