Questions on Electric Circuits
Q12. Jo uses a battery (composed of of two cells in series), a switch and a bulb to make a series circuit.
(a) Draw a circuit diagram for Jo's circuit. Label the components.
4 marks
(b) Jo closes the switch and the bulb lights up.
Then she connects the battery the other way round. What happens to the bulb when Jo closes the switch again?
A: It is brighter.
B: It is dimmer.
C: It is the same brightness.
D: It does not light up.
1 mark
(c) A corridor has a switch at each end and one light bulb in the middle. The circuit diagram below shows how they are connected.
In the diagram above, the switches are shown in positions B and D and the bulb is on. Complete the table below to show whether the light bulb is on or off. Write 'on' or 'off' in each cell of the table.
Position of switch 1 |
position of switch 2 |
Is the bulb on or off? |
B |
D |
ON |
A |
D |
|
B |
C |
|
A |
C |
|
3 marks
(d) The circuit is changed so that there is a bulb at each end of the corridor. They are connected as shown below.
(i) In the diagram above, the switches are shown in positions B and C. Which bulbs, if any, are on?
1 mark
(ii) The switches are flicked into a position so that both bulbs are on. Bulb X breaks. What, if anything, happens to bulb Y?
1 mark
Maximum 10 marks
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