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8.3 Power and efficiency

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Question 36
F

A lamp receives 800 J of electrical energy. It transfers 120 J by light. What is the efficiency of the lamp?

[1]
A

0.850.850.85

B

0.150.150.15

C

6.76.76.7

D

0.180.180.18

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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