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1.7 Energy, work and power

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Question 209

An electric toy motor transfers 45 J of energy in 60 seconds60\text{ seconds}60 seconds.

What is the power output of the motor?

A

0.75 W0.75\text{ W}0.75 W

B

1.3 W1.3\text{ W}1.3 W

C

45 W45\text{ W}45 W

D

2700 W2700\text{ W}2700 W

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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