9 Electricity

Electrons are particles that can be found in wires.

What happens to the electrons when current flows?

• The electrons vibrate more slowly

  
  

• The electrons do not move in the circui

  
  

• The electrons flow around the circuit

  
  

• The electrons move randomly in the circuit

  
  

Electrons in wires are free to move

• TRUE

• FALSE

Electrons have a positive charge

• TRUE

• FALSE

Complete the sentences. Use words from the list.

The words may be used once, more than once or not at all.

A. A cell has a ……………………… and a ………………………
terminal.

Complete the sentences. Use words from the list.

The words may be used once, more than once or not at all.

B. In a circuit, electrons flow away from the ………………………
terminal and towards the ……………………… terminal

Look at the circuit.

The arrows show the direction of electron flow.
Use these arrows to help you write + and – symbols on the cell in
the correct places

Answer explanation

Match the following names of the circuit symbols.

• open switch

• 
• lamp

• 
• cell

• 
• ammeter

• 

Which of these circuits will give light and sound a buzzer when the switch is closed?

• 
• 
• 
• 

In the spaces provided, draw circuit diagrams for:

a series circuit with two cells, two lamps and a switch

Answer explanation

In the spaces provided, draw circuit diagrams for:

a series circuit with one buzzer, one ammeter and a switch.

Answer explanation