A filament lamp is rated 60 W, 240 V. Assume that the filament resistance remains constant at its operating value.
(i) Determine the resistance of the filament when the lamp is working at its rated voltage.
(ii) The lamp is accidentally connected across a 120 V supply. Calculate the power it will now consume.
(iii) Two identical lamps are connected in parallel across the same 120 V supply. Find (a) the total current taken from the mains and (b) the total power consumed by the pair.