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10.2 Resistance

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Question 10

A technician tests the resistor chain from a museum display alarm. The chain contains a 100 Ω resistor, a 150 Ω resistor and a third resistor, all connected in series. When the chain is connected across a 12 V supply, the current in it is 0.040 A.

What is the resistance of the third resistor?

[1]
A

300 Ω300\ \Omega300 Ω

B

550 Ω550\ \Omega550 Ω

C

50 Ω50\ \Omega50 Ω

D

250 Ω250\ \Omega250 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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