Fig. 8.1 depicts a $240\,\text{V}$ mains supply linked to an air-conditioning unit and a freezer, with fuse X fitted in the circuit as shown. The freezer has an operating power of $700\,\text{W}$.
(a)[2]
Calculate the current in the freezer.
(b)[3]
Suggest a suitable rating for fuse X. Give two reasons for your answer.
(c)[3]
Explain why fuses of a higher rating are made of thicker wire.
(d(i))[2]
State two renewable sources of energy.
(d(ii))[1]
State one social, economic or environmental disadvantage of one of your answers to (d)(i).
Worked solution & mark scheme
This 11-mark question has a full step-by-step worked solution and mark scheme. One marking point: “P = VI” …