Two identical bulbs rated 40 W, 220 V are to be connected to the household mains.
(i) Draw separate circuit diagrams showing the bulbs connected (1) in series and (2) in parallel with the 220 V supply.
(ii) Which arrangement will make each bulb glow with its rated brightness? Explain your answer on the basis of potential difference across each bulb.
(iii) In each arrangement, state and explain what happens to the second bulb if one bulb suddenly gets fused.