Physics 0625 · IGCSE · Energy, work and power

Energy, work and power — practice question

Every minute, the kinetic energy in air flowing through a wind turbine is 720000 J. The turbine’s electrical output is 9.0 A at a potential difference (p.d.) of 240 V.
(main)[5]

Calculate the efficiency (%) of the wind turbine.

Worked solution & mark scheme

This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: “P = VI gives 2160 W OR E = VIt gives 129600 J” …

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