An electric kettle has a metal outer body.
Why would it be dangerous for the live wire of the electric cable to touch the metal body?
The power output of the electric kettle is 2.76 kW2.76\text{ kW}2.76 kW. The mains potential difference is 230 V230\text{ V}230 V. Calculate the current in the kettle.
The kettle heats water from 15 ∘C15\ ^\circ\text{C}15 ∘C to 95 ∘C95\ ^\circ\text{C}95 ∘C.
The power output of the kettle is is 2.76 kW2.76\text{ kW}2.76 kW.
The specific heat capacity of water is 4200 J/kg ∘C4200\text{ J/kg}\ ^\circ\text{C}4200 J/kg ∘C.
Calculate the mass of water that the kettle can heat in 28 seconds28\text{ seconds}28 seconds.
9 exam-style questions on AQA GCSE Physics 2.3 Domestic uses and safety, covering 2.3.1 Direct and alternating potential difference and 2.3.2 Mains electricity. Each one has a worked solution and a mark scheme showing where the marks go.