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Question 7

An experiment is performed to determine the Young modulus of a metal wire. A student measures the tension (force) applied to the wire, its original length, its extension, and its diameter.

The percentage uncertainties in these measurements are:

  • Tension: 3.0%
  • Original length: 1.5%
  • Extension: 5.5%
  • Diameter: 2.5%

Which measurement contributes the largest percentage uncertainty to the calculated value of the Young modulus?

A

Tension

B

Original length

C

Extension

D

Diameter

Markscheme

Materials Questions

  1. A Level
  2. /Physics
  3. /Materials

20 exam-style questions on AQA A Level Physics Materials, covering Bulk properties of solids and The Young modulus. Each one has a worked solution and a mark scheme showing where the marks go.

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