(a(i))[3]
Calculate the electrical energy supplied to this lamp in this period.
(a(ii))[1]
The lamp has an efficiency of 0.12 (12%). Calculate the energy given out by the lamp as light.
(b(i))[1]
The power station supplying electricity to the office burns oil as its fuel. State and explain whether oil is a renewable or a non-renewable source of energy.
(b(ii))[2]
Discuss one environmental effect of using oil as an energy source.