(a)[2]
Define potential difference (p.d.) in words.
(b(i))[1]
State the equation that defines electromotive force (e.m.f.) $E$.
(b(ii))[2]
Calculate the work done by the battery when it transfers a charge of 30 C round one complete circuit.
(c(i))[2]
Draw a circuit diagram showing these components connected in series.
(c(ii))[2]
Explain what happens in the circuit you drew in (c)(i) when the thermistor temperature is increased.