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1.7.4 Power

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Question 79

A water pump is used to lift a fixed volume of water through a vertical height of 5.0 m.

The operator then increases the electrical input power to the pump while keeping the efficiency of the pump the same.

Which row correctly describes the effect this has on the useful work done lifting the water and the time taken to lift it?

A

Useful work done: stays the same; Time taken: increases

B

Useful work done: stays the same; Time taken: decreases

C

Useful work done: increases; Time taken: decreases

D

Useful work done: increases; Time taken: stays the same

Markscheme

1.7.4 Power Questions

  1. IGCSE
  2. /Physics
  3. /1.7.4 Power

95 exam-style questions on CIE IGCSE Physics 1.7.4 Power. Each one has a worked solution and a mark scheme showing where the marks go.

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