CAIE IGCSE Physics: Potential Difference Definition Question Bank

Practise defining p.d. as work done per unit charge through a component, then applying that meaning to resistor energy transfers.

Exam points

state p.d. as work done per unit charge passing through a component
apply V = W/Q to energy transfer by charge through a resistor or circuit section

[Maximum number: 2]

A potential divider is made by connecting a light-dependent resistor (LDR) and a thermistor in series. Fig. 6.1 shows the potential divider, a voltmeter and a direct current (d.c.) power supply connected into a circuit.

Fig. 6.1

The voltmeter measures the potential difference (p.d.) across the LDR.

Define potential difference (p.d.).

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4.2.3.3—Potential difference (p.d.) as the question 1