Fig. 9.1 presents current-potential difference (p.d.) graphs for a resistor, a thermistor and a filament lamp. The resistor, the thermistor and the filament lamp are joined in series to a power supply.
(a(i))[2]
Draw a circuit diagram for this arrangement.
(a(ii))[1]
Add a voltmeter to the circuit diagram in (a)(i) in the correct position to measure the p.d. across the resistor.
(a(iii))[4]
Using the graph in Fig. 9.1, work out the p.d. across the terminals of the power supply when the p.d. across the resistor is 6.0 V.
(b)[1]
Describe a practical use for a thermistor.
Worked solution & mark scheme
This 8-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Four components connected one after another in series” …