A small wind-turbine drives an electric generator.
The wind blows with a velocity of 8.5 m/s at right angles to the plane of the turbine. The mass of air passing per second through the turbine is 9.2 kg.
Calculate the kinetic energy of the air blown through the turbine per second.
Only 12% of this kinetic energy is converted to electrical energy. Calculate the electrical power output of the generator.
The volume of air passing through the turbine each second is 7.8 m3. Calculate the density of the air.
Describe the essential action within the generator that produces electricity.
142 exam-style questions on CIE IGCSE Physics 1.7.3 Energy resources. Each one has a worked solution and a mark scheme showing where the marks go.