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10.2 Resistance

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Question 30
H

A 12 Ω resistor and a variable resistor are in series across 9.0 V. The current changes from 0.30 A to 0.50 A. By how much has the resistance of the variable resistor decreased?

[1]
A

12 Ω12\ \Omega12 Ω

B

6.0 Ω6.0\ \Omega6.0 Ω

C

18 Ω18\ \Omega18 Ω

D

24 Ω24\ \Omega24 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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