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1.7 Energy, work and power

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Question 130

An electric motor produces 540 kJ of useful energy in 3.0 minutes3.0\text{ minutes}3.0 minutes.

What is the average power output of the motor?

A

3.0 kW3.0\text{ kW}3.0 kW

B

180 kW180\text{ kW}180 kW

C

1620 kW1620\text{ kW}1620 kW

D

97 200 kW97\,200\text{ kW}97200 kW

Markscheme

1.7 Energy, work and power Questions

  1. IGCSE
  2. /Physics
  3. /1.7 Energy, work and power

533 exam-style questions on CIE IGCSE Physics 1.7 Energy, work and power, covering 1.7.1a Energy stores and energy transfers, 1.7.1b Conservation of energy, 1.7.1c Kinetic and gravitational potential energy, 1.7.2 Work done, 1.7.3 Energy resources, 1.7.3a Energy resources and electricity generation, 1.7.3b Nuclear fusion as an energy source, 1.7.3c Efficiency of energy transfer, and 1.7.4 Power. Each one has a worked solution and a mark scheme showing where the marks go.

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