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Making measurements and analysing data

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Question 7

A student uses a digital multimeter to measure the resistance of a constantan wire at five different points along its length. The readings obtained are:

12.42 Ω,12.31 Ω,12.53 Ω,12.38 Ω,12.46 Ω 12.42\ \Omega, \quad 12.31\ \Omega, \quad 12.53\ \Omega, \quad 12.38\ \Omega, \quad 12.46\ \Omega 12.42 Ω,12.31 Ω,12.53 Ω,12.38 Ω,12.46 Ω

What is the absolute uncertainty in the resistance of the wire based on these measurements?

A

0.22 Ω0.22\ \Omega0.22 Ω

B

0.11 Ω0.11\ \Omega0.11 Ω

C

0.04 Ω0.04\ \Omega0.04 Ω

D

0.01 Ω0.01\ \Omega0.01 Ω

Markscheme

Making measurements and analysing data Questions

  1. A Level
  2. /Physics
  3. /Making measurements and analysing data

26 exam-style questions on OCR A A Level Physics Making measurements and analysing data, covering Measurements and uncertainties. Each one has a worked solution and a mark scheme showing where the marks go.

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