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Question 31647
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Current Electricity: Electrical Energy MCQ

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Electrical EnergyEasyQuestion 31647

Question

Electrical energy consumed by a 100 W bulb in 2 hours is:
  1. A
    200 J
  2. B
    200 Wh
  3. C
    720 kJ
    Correct
  4. D
    720 J

Correct answer

720 kJ

Explanation

E = P×t = 100 W × 7200 s = 720,000 J = 720 kJ. (Note: 200 Wh is also correct as a unit, but 720 kJ is the SI answer.)

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