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Physics · Oct / Nov 2021 · Paper 11 · Question 33

5054Uses of electricity

The cost of electricity is 9.0 cents / kW h. It takes 0.060 hours and costs 1.2 cents to boil the water in a kettle. What is the power rating of the kettle?

  1. A0.45 kW
  2. B0.65 kW
  3. C2.2 kW
  4. D130 kW

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Correct answer: C. 2.2 kW

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