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GCSE COMBINED SCIENCE: TRILOGY Higher Tier Physics Paper 1H : QUESTIONS

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Chemistry

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Questions Only

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Give the potential difference and frequency of the mains electricity supply in the UK. [2 marks] The potential difference is V The frequency is Hz The washing machine is switched on. What is the potential difference between the neutral wire and the earth wire? [1 mark] Potential difference = V The plug has a fuse. Draw the circuit symbol for a fuse in the space below. [1 mark] Question 1 continues on the next page The washing machine has a metal case. A fault causes the live wire to make an electrical connection with the metal case of the washing machine. The earth wire is not connected to the metal case of the washing machine. Explain why it would not be safe for a person to touch the metal case.