Lesson: Chapter 10 — Power and energy in electrical appliances

10.3. Efficiency and saving energy 3 of 4 Reset answers

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Question 3

An appliance wastes 40% of its energy as heat. What is its efficiency?

A 40% B 100% C 60% D 140%

The right answer is the one marked above.

60%. The rest, 60%, goes into the job.

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