Cambridge IGCSE Combined Science practice

Paper 3 structured question: Electrical circuits

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

At a glance

Paper

Marks

Topic

Electrical circuits

Exam-style question

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Paper 3Theory (Core)3 marks

Understanding the impact of adding resistors in series.

Description

Consider a series circuit with two resistors, R1 = 5Ω and R2 = 15Ω. What happens if a third resistor, R3 = 10Ω, is added?

a
Discuss the effect on total resistance when R3 is added to the circuit.
Your answer
Aim for approximately 3 distinct marking points.
[3]

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Paper 3Theory (Core)2 marks

Description

A circuit contains three resistors connected in series: R1 = 4Ω, R2 = 6Ω, and R3 = 10Ω.

a
Calculate the total resistance of the circuit.
Your answer
Aim for approximately 2 distinct marking points.
[2]