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2.2 Series and parallel circuits

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Question 37

A student tests a small water-heating unit using a 12 V supply, a 10 Ω heating element and 10 Ω resistors. The heating element and one resistor are connected in series. The student measures the current, then adds a second 10 Ω resistor in series with them.

Circuit arrangementCurrent from the supply
Heating element and one resistor in series0.60 A
Heating element and two resistors in series0.40 A
a.

Explain why the current decreases when the second resistor is added in series.

[2]
b.

The student now connects the second resistor in parallel with the first resistor, leaving the heating element in series with them. Predict whether the current from the supply will be greater than, equal to, or less than 0.60 A. Explain your answer.

[2]
Markscheme

2.2 Series and parallel circuits Questions

  1. GCSE
  2. /Physics
  3. /2.2 Series and parallel circuits

94 exam-style questions on AQA GCSE Physics 2.2 Series and parallel circuits, covering 2.2 Series and parallel circuits. Each one has a worked solution and a mark scheme showing where the marks go.

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