Skip to content

Course home

1.2 Conservation and dissipation of energy

1.2 Conservation and dissipation of energy

EasyMedium
12345678910111213141516171819202122232425
Question 9

The mean power output of a large wind farm is 520 MW520\text{ MW}520 MW, which is enough to supply power to 400 000400\,000400000 homes.

a.

Calculate the mean power needed for 1 home. Give your answer in watts.

[3]
b.

Some of the kinetic energy of the wind is wasted as thermal energy in the gears and bearings of the turbines. An engineer applies a lubricant to these moving parts. Explain how applying a lubricant affects the efficiency of the wind turbines.

[3]
Markscheme

1.2 Conservation and dissipation of energy Questions

  1. GCSE
  2. /Physics
  3. /1.2 Conservation and dissipation of energy

26 exam-style questions on AQA GCSE Physics 1.2 Conservation and dissipation of energy, covering 1.2.1 Energy transfers in a system and 1.2.2 Efficiency. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank