Learning objective

Discuss the necessity for the outer casing of electrical devices to be either non-conductive (double-insulated) or connected to the earth.

Read the explanation, check the common trap, then practise with flashcards and questions.

Exam focus

Cambridge IGCSE Combined ScienceElectricityCore content

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Quick explanation

This point belongs to Electrical safety, especially Electrical safety outcomes.
You need to be able to discuss the necessity for the outer casing of electrical devices to be either non-conductive (double-insulated) or connected to the earth.
The key ideas to know are Explain.
Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

Explain

Why it matters

This objective helps connect Electrical safety outcomes to exam-style questions, flashcards, and revision notes for Electrical safety.

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Flashcards10 linked cards

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Practice Questions7 linked questions

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Paper 3Theory (Core)3 marks

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]

Revision notestopic notes

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