1. The drawing shows an electric circuit.
(a) How could the voltage of this circuit be increased? [1]
(b) Describe how you could add a voltmeter to the circuit in a position where it could be used to measure the potential difference across the filament lamp. [1]
(c) What would happen to the current in the circuit if another filament lamp was added in series?
increase decrease stay the same
Explain your answer.
[2]
2. The circuit diagram below shows a battery connected to a lamp and a switch.
(a) State what happens to the lamp when: (i) the switch is open (OFF) - lamp will be on off (ii) the switch is closed (ON) - lamp will be on off [2]
(a) State what happens to the lamp when:
(i) the switch is open (OFF) - lamp will be on off (ii) the switch is closed (ON) - lamp will be on off [2]
(i) the switch is open (OFF) - lamp will be on off
(ii) the switch is closed (ON) - lamp will be on off [2]
(b) When the switch is closed what problem is caused in the circuit?
[1]
(c) how should the switch be correctly connected? [1]
3. Some students want to find out how the current through component X changes with the voltage they use.
The diagram shows their circuit. The graph shows their results.
(a) Describe, as fully as you can, what happens to the current through component X as the students increase the voltage.
[4]
(b) The students want to find out whether component X allows the same current to flow through it in the opposite direction.
(i) How should they change the circuit to test this? [1]
(ii) The graph shows the students’ extra results. What do the extra results tell you?
(ii) The graph shows the students’ extra results.
What do the extra results tell you?
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