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10.2 Resistance

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Question 38
H

A student measures a resistor with 4.0 V across it. The ammeter indicates 0.20 A, but the actual current could be between 0.19 A and 0.21 A. Treat the voltage as exact. What are the minimum and maximum possible resistances, to three significant figures?

[1]
A

19.0 Ω19.0\ \Omega19.0 Ω to 20.0 Ω20.0\ \Omega20.0 Ω

B

18.0 Ω18.0\ \Omega18.0 Ω to 22.0 Ω22.0\ \Omega22.0 Ω

C

20.0 Ω20.0\ \Omega20.0 Ω to 21.1 Ω21.1\ \Omega21.1 Ω

D

19.0 Ω19.0\ \Omega19.0 Ω to 21.1 Ω21.1\ \Omega21.1 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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