Figure 8.1 shows a person cutting grass with a lawnmower. The lawnmower is connected to the mains supply of 230 V. The power of the lawnmower is 1200 W. Calculate the current in the lawnmower.

a person pushing a mains-powered lawnmower across grass, with the trailing supply cable behind them

8(a)(ii)Electrical Power Energy Domestic ElectricityEasy2 marks

The lawnmower circuit contains a trip switch. Explain the purpose of the trip switch.

Answer

0 words

8(a)(iii)Electrical Power Energy Domestic ElectricityEasy1 mark

State one advantage of using a trip switch instead of a fuse in the lawnmower circuit.

8(b)(i)Electrical Power Energy Domestic ElectricityMedium3 marks

A person uses the lawnmower for 0.75 h. One kilowatt‑hour of energy costs $0.34. Calculate the energy transferred to the lawnmower in 0.75 h. Give your answer in kW h.

8(b)(ii)Electrical Power Energy Domestic ElectricityEasy1 mark

Calculate the cost of the energy calculated in 8(b)(i).