(a)[2]
Distinguish between electromotive force (e.m.f.) and potential difference (p.d.) by referring to the different meanings of each.
(b(i))[1]
Explain why the power dissipated in each lamp is not $48\text{ W}$ in the circuit shown in Fig. 6.1.
(b(ii))[2]
Calculate the resistance of one lamp.
(b(iii))[2]
Calculate the current supplied by the battery.
(b(iv))[2]
Calculate the power dissipated by one lamp.
(c)[2]
A third identical lamp is connected in parallel in the circuit of Fig. 6.1. Describe and explain the effect on the terminal p.d. of the battery.