Magnetic Fields

Question 1

What’s a magnetic field

Answer 1

The area around a magnet where a magnetic force acts

Question 2

Name the only magnetic metals

Answer 2

Iron steel cobalt and nickel

Question 3

How can you make the magnetic field stronger

Answer 3

You can turn the current up

Question 4

What’s an electromagnet

Answer 4

When electricity is passed through a coil of wire, the coil has a magnetic field around it, this is an electromagnet.

Question 5

How do you make a compass

Answer 5

All magnetic materials have a magnetic domain which acts like a tiny magnet. Usually they’re jumbled but in a magnet they point in the same directions. By stroking the needle with a magnet, you can line up the domain to magnetise the needle

Question 6

How/when are electromagnets used

Answer 6

You can use them in relays, which includes electromagnets, is used to allow a small current in one circuit and to control a large current in another circuit

Question 7

What are the two ends of the magnet called?

Answer 7

South and North

Question 8

What is an electric field caused by

Answer 8

An electric current flowing through a coil of wire