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Course: OCR A Level Physics A H556
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Curriculum

OCR A Level Physics A H556

1. Development of Practical Skills in Physics

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2. Foundations in Physics

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3. Forces and Motion

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4. Electrons, Waves and Photons

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OCR H556 chapter questions and answers

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Quiz

3.7.6 Young’s Modulus – Check yourself

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  • Questions count: 6
  • Passing grade: B+
  • Time limit: 10 minutes
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1.
The unit of the Young modulus is
N
N m
Pa
no unit
2.
Which change would double the extension of a wire for the same force?
Double the diameter
Double the length
Halve the length
Use double the E
3.
A wire of length 1.0 m, area 1.0 × 10⁻⁶ m², E = 2.0 × 10¹¹ Pa has k =
2.0 × 10⁵ N m⁻¹
2.0 × 10¹⁷ N m⁻¹
2.0 × 10⁻⁵ N m⁻¹
2.0 × 10⁴ N m⁻¹
4.
The main source of percentage uncertainty in measuring E for a wire is usually
the load
the temperature of the room
the length
the diameter
5.
For a wire with Young modulus E, stress σ gives strain
σE
E/σ
σ/E
σ²/E
6.
A copper wire and a steel wire of the same size carry the same force. Steel (higher E) shows
more extension
less extension
the same extension
double extension
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Part of 3. Forces and Motion — see every lesson and quiz in this unit.
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