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4.2.5 Electrical energy and electrical power

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Question 14

An electric generator produces an electromotive force (e.m.f.) of 240 V and produces a current of 4.0 A in a circuit. The generator is driven by an engine with a power of 3.2 kW.

What is the efficiency of the generator?

A

7.5%7.5\%7.5%

B

30%30\%30%

C

75%75\%75%

D

83%83\%83%

Markscheme

4.2.5 Electrical energy and electrical power Questions

  1. IGCSE
  2. /Physics
  3. /4.2.5 Electrical energy and electrical power

69 exam-style questions on CIE IGCSE Physics 4.2.5 Electrical energy and electrical power. Each one has a worked solution and a mark scheme showing where the marks go.

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