Electromagnetism

Question 1

What three things does an electromagnet need to work

Answer 1

Coil, Core, Current

Question 2

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

Answer 2

You can switch an electromagnet off

Question 3

If you pass a magnet along a coil you induce a potential difference creating an electric current. What happens if you hold the magnet inside the coil

Answer 3

The reading becomes zero

Question 4

What would happen to the reading if you used the other pole of the magnet

Answer 4

The reading would become negative

Question 5

If you added more coils what would happen to the reading

Answer 5

It would increase

Question 6

Name two magnetic materials

Answer 6

2 from:
Iron
Nickel
Cobalt

Question 7

In an investigation what is the dependent variable

Answer 7

The thing you are recording

Question 8

In an investigation what is the independent variable

Answer 8

The thing you are changing

Question 9

If you pass a magnet along a coil you induce a potential difference creating an electric current. What happens to the reading if you move the magnet faster

Answer 9

The reading will increase as the magnet speeds up