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8.3 Power and efficiency

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Question 51
F

The table shows measurements for two motors lifting loads.

MotorInput energy in JUseful energy in JTime in s
X10006003.0
Y8005604.0

Which statement is correct?

[1]
A

Y has greater efficiency and smaller useful power.

B

Y has greater efficiency and greater useful power.

C

X has greater efficiency and smaller useful power.

D

X has greater efficiency and greater useful power.

Markscheme

8.3 Power and efficiency Questions

  1. GCSE
  2. /Physics
  3. /8.3 Power and efficiency

128 exam-style questions on Edexcel GCSE Physics 8.3 Power and efficiency, covering 8.3.1 Power and 8.3.2 Efficiency. Each one has a worked solution and a mark scheme showing where the marks go.

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