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Physics · Oct / Nov 2020 · Paper 11 · Question 39

5054Uses of electricity

A student calculates the amount of energy used by an electric heater. What is the equation for calculating the energy E in kW h?

  1. AE = I (ampere) × V (volt) × t (second)
  2. BE = I (ampere) × V (volt) × t (hour)
  3. CE = I (ampere) × V (volt) × t (second) ÷ 1000
  4. DE = I (ampere) × V (volt) × t (hour) ÷ 1000

As printed in the paper

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Correct answer: D. E = I (ampere) × V (volt) × t (hour) ÷ 1000

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