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1.7 Energy, work and power

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Question 15

A solar panel is used to recharge a battery. The solar panel produces 1.8 W of electrical power. The panel is 15% efficient.

What is the power input of the sunlight onto the solar panel?

A

0.27 W0.27\text{ W}0.27 W

B

1.2 W1.2\text{ W}1.2 W

C

12 W12\text{ W}12 W

D

120 W120\text{ W}120 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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