A workshop belt sander is connected to a UK mains electricity supply which has a potential difference of 230 V230\text{ V}230 V.
The current in the belt sander is 4.5 A4.5\text{ A}4.5 A. Calculate the power of the belt sander.
Use the equation:
power=potential difference×current \text{power} = \text{potential difference} \times \text{current} power=potential difference×currentCalculate the energy transferred by the belt sander when 750 C750\text{ C}750 C of charge flows through it.
Use the equation:
energy transferred=charge flow×potential difference \text{energy transferred} = \text{charge flow} \times \text{potential difference} energy transferred=charge flow×potential differenceDuring maintenance, the casing of the belt sander is removed, leaving a live wire exposed inside. Describe the difference between the hazard and the risk in this scenario for a technician attempting to repair the unit while it is plugged in.
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.