A student observes that every electrical appliance in a house is connected to the same 220V mains, yet each can be switched on or off independently.
Answer the following questions related to this observation:
(i) State what is meant by the term “potential difference” between two points in an electric circuit.
(ii) Explain, with any two reasons, why all household appliances are connected in parallel rather than in series.
(iii) If the filament of one bulb connected in a room burns out, what happens to the working of the remaining appliances? Give a reason for your answer.