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2.2.1 Thermal expansion of solids, liquids and gases

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Question 20

Why are overhead power lines hung with a noticeable sag (slack) between support poles?

A

to allow for contraction of the power lines on a cold day

B

to allow for expansion of the power lines on a cold day

C

to allow for contraction of the power lines on a hot day

D

to allow for expansion of the power lines on a hot day

Markscheme

2.2.1 Thermal expansion of solids, liquids and gases Questions

  1. IGCSE
  2. /Physics
  3. /2.2.1 Thermal expansion of solids, liquids and gases

96 exam-style questions on CIE IGCSE Physics 2.2.1 Thermal expansion of solids, liquids and gases. Each one has a worked solution and a mark scheme showing where the marks go.

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