Skip to content

Course home

Sign up

8.3 Power and efficiency

EasyMediumHard
12345678910111213141516171819202122232425262728293031323334353637
Question 4

During one drying session, a hair dryer transfers 54 kJ usefully and transfers 6.0 kJ to the surroundings in unwanted ways.

Calculate the efficiency of the hair dryer as a percentage.

[3]
Markscheme

8.3 Power and efficiency Questions

  1. GCSE
  2. /Physics
  3. /8.3 Power and efficiency

128 exam-style questions on Edexcel GCSE Physics 8.3 Power and efficiency, covering 8.3.1 Power and 8.3.2 Efficiency. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank