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Cambridge IGCSE Physics practice

Paper 3 structured question: Electrical safety

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Electrical safety

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Paper 3Theory (Core)2 marks

Safety in electrical circuits.

Description

Switch Connection in Mains Circuit

In a mains circuit, the switch should be connected to the live wire to ensure safety when turning off the circuit.

  1. a

    Explain Why should the switch be connected to the live wire?

    Aim for approximately 2 distinct marking points.

    [2]

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Paper 3 structured question: Electrical safety

Paper 3Theory (Core)1 marks

Description

Mains Circuit Components

A mains circuit consists of a live wire, a neutral wire, and an earth wire. The live wire carries current to the appliance, the neutral wire returns the current, and the earth wire provides a safety path for excess current.

  1. a

    State Name the three wires in a mains circuit.

    Aim for approximately 1 distinct marking point.

    [1]