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2.2 Thermal properties and temperature

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Question 11

The distance between two telephone poles is 50 m. An engineer installs a copper communication cable of length 51.5 m between them.

Why does the engineer choose a cable that is longer than the distance between the two poles?

A

to allow for contraction of the cable in cold weather

B

to speed up the transmission of electrical signals

C

to decrease the strength of the electric current

D

to create a downward slope so that electric charge can flow more easily

Markscheme

2.2 Thermal properties and temperature Questions

  1. IGCSE
  2. /Physics
  3. /2.2 Thermal properties and temperature

528 exam-style questions on CIE IGCSE Physics 2.2 Thermal properties and temperature, covering 2.2.1 Thermal expansion of solids, liquids and gases, 2.2.2a Internal energy and temperature, 2.2.2b Specific heat capacity, 2.2.3a Melting, boiling, condensation and solidification, 2.2.3b Evaporation, and 2.2.3c Cooling by evaporation. Each one has a worked solution and a mark scheme showing where the marks go.

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