(a)[2]
On Fig. 5.1, sketch the thermistor’s temperature characteristic.
(b(i))[1]
Explain why the power transformed in the battery is equal to the total power transformed in X, Y and Z.
(b(ii))[2]
Calculate the current flowing in the circuit.
(b(iii))[3]
Calculate X’s resistance.
(b(iv))[2]
The temperature of Z is increased. State and explain what happens to the potential difference across Z.
(c(iii))[3]
Calculate X’s resistance.
(c(iv))[2]
When the temperature of Z is increased, State and explain what happens to the potential difference across Z.