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2.3.2 Convection

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Question 2

An electric convector heater is used to warm the air in a small office.

a.

State the main method of thermal energy transfer throughout the air in the office.

[1]
b.

Explain how the heater warms all the air in the office.

[3]
c.

The power of the heater is 1.8 kW when it is connected to a mains supply with an e.m.f. of 240 V.

Show that the current in the heater is 7.5 A.

[2]
d.

The plug connecting the heater to the mains supply is fitted with a fuse. Fuse ratings of 3 A, 5 A, 10 A, and 13 A are available. State which fuse should be used and explain your choice.

[3]
Markscheme

2.3.2 Convection Questions

  1. IGCSE
  2. /Physics
  3. /2.3.2 Convection

73 exam-style questions on CIE IGCSE Physics 2.3.2 Convection. Each one has a worked solution and a mark scheme showing where the marks go.

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