1. Series and parallel 5 Look carefully at this circuit:
7Jc
Series and parallel
5 Look carefully at this circuit:
a) Which switches have to be closed for bulb A to come on?
b) Which bulbs will come on if you press switches 1 and 3?

2. 7Jc
Series and parallel
6 Mrs Jones has some Christmas tree lights, and one bulb is broken. They will not come on until she has replaced the bulb.
a) Are the lights connected in a series or parallel?
b) Explain your answer.
7 Only one of Mr Patel’s headlights is working on his car. Are the lights in series or parallel? Explain your answer.

3. 7Jc
Series and parallel
8 A cell connected to two bulbs in a series circuit will last longer than if it is connected to the same two bulbs in a parallel circuit. Explain why this happens.

4. Series and parallel 5 Look carefully at this circuit:
7Jc
Series and parallel
5 Look carefully at this circuit:
a) Which switches have to be closed for bulb A to come on?
1 only
b) Which bulbs will come on if you press switches 1 and 3?
A and B

5. 7Jc
Series and parallel
6 Mrs Jones has some Christmas tree lights, and one bulb is broken. They will not come on until she has replaced the bulb.
a) Are the lights connected in a series or parallel?
b) Explain your answer.
Series; because when one was broken none of them would work.

6. 7Jc
Series and parallel
7 Only one of Mr Patel’s headlights is working on his car. Are the lights in series or parallel? Explain your answer.
Parallel; if they were in series neither would work if one was broken.

7. 7Jc
Series and parallel
8 A cell connected to two bulbs in a series circuit will last longer than if it is connected to the same two bulbs in a parallel circuit. Explain why this happens.
Because current is lower and so does not get used up so quickly.