1. Which statement is correct?
A A fuse is included in a circuit to prevent the current becoming too high.
B A fuse should be connected to the neutral wire in a plug.
C An electric circuit will only work if it includes a fuse.
D An earth wire is needed to prevent the fuse blowing.
2. The diagram shows a torch containing two 2 V cells, a switch and a lamp.
What is the circuit diagram for the torch?
3. The circuit shown contains four lamps and three switches.
Which switches must be closed to light only lamps 1 and 3?
A switch 1 only
B switch 1 and switch 2 only
C switch 1 and switch 3 only
D switch 2 and switch 3 only
4 Which circuit shows how a voltmeter is connected to measure the potential difference across the cell?
5. When the thermistor in the circuit below is heated, the lamp becomes brighter.
Why does this happen?
A The resistance of the lamp decreases.
B The resistance of the lamp increases.
C The resistance of the thermistor decreases.
D The resistance of the thermistor increases.
6. A 3.0Ωlamp and a 6.0Ω lamp are connected in series.
What is the total resistance of the combination?
7. Four lamps are labelled ‘60W 240 V’. In which circuit are the lamps connected so that they all work at normal brightness?