Cambridge IGCSE Combined Science practice

Paper 3 structured question: Electrical quantities

Try the question first, then check the answer and practise the same topic again.

At a glance

Paper

Marks

Topic

Electrical quantities

Exam-style question

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Paper 3Theory (Core)2 marks

Understanding electric current in metals is essential for various applications in electronics and electrical engineering.

Description

In metals, electric current is caused by the flow of electrons when a potential difference is applied across the conductor.

a
Explain how electric current is generated in metals.
Your answer
Aim for approximately 2 distinct marking points.
[2]

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Paper 3Theory (Core)4 marks

Description

Metals are known for their ability to conduct electricity due to the presence of free electrons.

a
Discuss the factors that affect the conductivity of metals.
Your answer
Aim for approximately 4 distinct marking points.
[4]