Electromagnetism

1

How many poles does a magnet have?

2

What would happen if we put a North and a North pole together?

3

How do we tell if an object is magnetised?

4

What kind of magnetic field does a current in a wire produce?

5

What is a solenoid?

6

What is an electromagnet?

7

What can we add to an electromagnet to make it switch off rapidly?

8

What effect does increasing the number of coils have on an electromagnet?

9

Which of the following is a way to induce a voltage in a wire?

10

How do we make the induced voltage greater?