O-LevelPhysicsElectricity5054/11 · Oct/Nov 2020 · Q391 Mark

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

AE = I (ampere) × V (volt) × t (second)

BE = I (ampere) × V (volt) × t (hour)

CE = I (ampere) × V (volt) × t (second) ÷ 1000

DE = I (ampere) × V (volt) × t (hour) ÷ 1000

✓ Correct answer

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

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Topic: Electricity, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, Oct/Nov 2020 Paper 1 Variant 1, question 39.

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