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Physics · May / June 2020 · Paper 12 · Question 21

5054Uses of electricity

The 200 V battery of an electric car is charged with a current of 33 A for 4.0 hours. The efficiency of the charging process is 90%. How much useable energy is transferred to the battery?

  1. A21 MJ
  2. B86 MJ
  3. C95 MJ
  4. D106 MJ

As printed in the paper

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Correct answer: B. 86 MJ

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