Electricity

Question 1

What happens when charges move?

Answer 1

We get an electrical current.

Question 2

What does the size of current depend on?

Answer 2

1. The number of cells

2. The number of components in the circuit

Question 3

What are all substances made from?

Answer 3

Atoms

Question 4

How can substances become charged?

Answer 4

When substances run together, it is possible to transfer electrons from one material to another. This is because of friction.

Question 5

What is the law for charges?

Answer 5

Like charges repel, opposite charges attract.

Question 6

What happens when you charge polythene with wool?

Answer 6

Electrons move from the wool onto the polythene.
Polythene becomes negatively charged because it gained electrons.
Wool became positively charged because it lost electrons.

Question 7

What happens when acetate is charged with wool?

Answer 7

Electrons move from the acetate onto the wool.
Acetate becomes positively charged because it loses electrons.
Wool becomes negatively charged because it gained electrons.