Magnets & Static Electricity

Front

What is a magnetic field?

Back

A magnetic field is an invisible area around a magnet where magnetic forces can be felt.

Front

What are electromagnets?

Back

Electromagnets are magnets created by electricity flowing through a wire, often wrapped around a metal core.

Front

Which materials can stick to a magnet?

Back

Some metals like iron, nickel, and cobalt can stick to a magnet.

Front

What is needed to build an electromagnet?

Back

To build an electromagnet, you need a wire, a nail (or metal core), and a battery.

Front

What is static electricity?

Back

Static electricity is the build-up of electric charge on the surface of objects.

Front

How can you create static electricity?

Back

You can create static electricity by rubbing certain materials together, like a balloon on your hair.

Front

What happens when you bring two magnets close together?

Back

If the magnets are opposite poles, they attract; if they are the same poles, they repel.

Front

What is the purpose of a speaker?

Back

A speaker uses electromagnets to convert electrical energy into sound.

Front

What is a common use of static electricity?

Back

A common use of static electricity is in photocopiers, where it helps attract ink to paper.

Front

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

Back

A permanent magnet always has a magnetic field, while an electromagnet's field can be turned on and off.