Cambridge IGCSE Combined Science practice

Paper 3 structured question: Electrical circuits

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Paper

Marks

Topic

Electrical circuits

Exam-style question

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Paper 3Theory (Core)3 marks

Analyzing the effects of adding resistors in parallel.

Description

Discuss the impact on total resistance when a third resistor is added in parallel to two existing resistors.

a
Discuss the changes in total resistance when a third resistor is added in parallel.
Your answer
Aim for approximately 3 distinct marking points.
[3]

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Paper 3Theory (Core)2 marks

Description

In a circuit with two resistors, R1 = 5Ω and R2 = 10Ω, connected in parallel, calculate the total resistance.

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