Cambridge IGCSE Combined Science practice

Paper 3 structured question: Electrical safety

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Paper

Marks

Topic

Electrical safety

Exam-style question

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Paper 3Theory (Core)3 marks

Discuss the safety measures in electrical devices.

Description

Electrical devices must be designed to prevent electric shock to users. This can be achieved through various safety features.

a
Discuss the necessity for the outer casing of electrical devices to be either non-conductive or connected to the earth.
Your answer
Aim for approximately 3 distinct marking points.
[3]

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Paper 3Theory (Core)3 marks

Description

Electrical devices are equipped with various safety features to protect users from electric shock.

a
Evaluate the effectiveness of double insulation compared to earthing in preventing electric shock.
Your answer
Aim for approximately 3 distinct marking points.
[3]