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8.3 Power and efficiency

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Question 66

The table gives measurements for two motors.

Motor	Input power in W	Useful energy transferred in J	Time in s
X	250	1800	12
Y	300	2400	10

What is the ratio of the efficiency of Y to the efficiency of X?

[1]

$1.20$

$1.60$

$0.75$

$1.33$

Markscheme

8.3 Power and efficiency Questions

GCSE
Physics
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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