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Question 5

A support wire of cross-sectional area 3.6 × 10-7 m2 in a high-precision laboratory balance is subjected to a tensile load of 54 N. The resulting strain in the wire is measured to be 0.080%.

Which value of the Young modulus of the wire material is correct and expressed to an appropriate number of significant figures?

A

1.88×109 Pa1.88 \times 10^9\text{ Pa}1.88×109 Pa

B

1.88×1011 Pa1.88 \times 10^{11}\text{ Pa}1.88×1011 Pa

C

1.9×1011 Pa1.9 \times 10^{11}\text{ Pa}1.9×1011 Pa

D

1.9×109 Pa1.9 \times 10^9\text{ Pa}1.9×109 Pa

Markscheme

Materials Questions

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

15 exam-style questions on OCR A A Level Physics Materials, covering Springs and Mechanical properties of matter. Each one has a worked solution and a mark scheme showing where the marks go.

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