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1.7.1a Energy stores and energy transfers

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Question 51

An electric pump provides 1400 J of useful output energy. The efficiency of the pump is 70%. How much electrical energy is supplied to the pump?

A

20 J20\text{ J}20 J

B

980 J980\text{ J}980 J

C

2000 J2000\text{ J}2000 J

D

9800 J9800\text{ J}9800 J

Markscheme

1.7.1a Energy stores and energy transfers Questions

  1. IGCSE
  2. /Physics
  3. /1.7.1a Energy stores and energy transfers

229 exam-style questions on CIE IGCSE Physics 1.7.1a Energy stores and energy transfers. Each one has a worked solution and a mark scheme showing where the marks go.

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