A sensing device tracks the amount of fuel in a car’s fuel tank. It produces a voltage output, which is measured with a voltmeter. Fig. 9.1 shows how the voltmeter reading changes as the fuel volume in the tank changes.
(a)[1]
Use Fig. 9.1 to find the range of volume for which volume has a linear relationship to the voltmeter reading. From __________ litres to __________ litres.
(b(i))[2]
Suggest why, by comparing values in Fig. 9.1, the voltmeter readings make fuel consumption seem low when the tank is nearly full.
(b(ii))[2]
Suggest why, by comparing values in Fig. 9.1, there is more fuel left than expected when the voltmeter first shows that the tank is nearly empty.
Worked solution & mark scheme
This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: “The correct range is $30$-$54\ \text{litres}$” …