Cambridge IGCSE Physics practice

Paper 3 structured question: Electric current

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Paper

Marks

Topic

Electric current

Exam-style question

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Paper 3Theory (Core)3 marks

Understanding the factors affecting electrical conduction in metals is crucial for applications in electronics.

Description

The conductivity of metals can be influenced by temperature and impurities.

a
Describe how temperature affects the electrical conductivity of metals.
Your answer
Aim for approximately 3 distinct marking points.
[3]

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Paper 3Theory (Core)1 marks

Description

Metals conduct electricity due to the presence of free electrons that can move through the metal lattice when an electric field is applied.

a
State the role of free electrons in electrical conduction in metals.
Your answer
Aim for approximately 1 distinct marking point.
[1]