(a(i))[2]
Calculate the current flowing through the lamp.
(a(ii))[2]
Calculate the resistance of the lamp in this circuit.
(b(i))[2]
A student has a battery with electromotive force (e.m.f.) 12 V. The student uses this battery in a circuit with the 12 V filament lamp to obtain a suitable range of readings and plot the current-voltage graph for the lamp. Fig. 7.1 shows the battery and the filament lamp. Complete the circuit diagram on Fig. 7.1 for a suitable circuit. Additional components will be needed.
(b(ii))[2]
On Fig. 7.2, sketch the shape of the current-voltage graph for the filament lamp.
(b(iii))[2]
State how the resistance of a filament lamp changes as the applied voltage increases and explain one reason for this change.