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10.2 Resistance

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Question 19
F

A 12 V supply is connected to a 20 Ω resistor and a variable resistor in series. The current is 0.30 A. What is the resistance of the variable resistor?

[1]
A

4.0 Ω4.0\ \Omega4.0 Ω

B

16 Ω16\ \Omega16 Ω

C

40 Ω40\ \Omega40 Ω

D

20 Ω20\ \Omega20 Ω

Markscheme

10.2 Resistance Questions

  1. GCSE
  2. /Physics
  3. /10.2 Resistance

81 exam-style questions on Edexcel GCSE Physics 10.2 Resistance, covering 10.2.1 Current in a circuit and conservation at junctions, 10.2.2 Resistance and variable resistors, 10.2.3 Series and parallel resistance, 10.2.4 I–V characteristics of components, and 10.2.5 LDRs and thermistors. Each one has a worked solution and a mark scheme showing where the marks go.

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