Commercial Unit of Energy (kWh) MCQs
Practice Commercial Unit of Energy (kWh) multiple-choice questions from Work and Energy (Class 9 Science) - tap an answer for instant feedback and a step-by-step solution. Practice the full set free on the RankByte app.
Commercial Unit of Energy (kWh)Quiz - Solve & Score
Q1. An energy meter records 1 kWh of electrical energy in a flat in Mumbai; how many joules does this represent?
- A.1 000 J
- B.3 600 J
- C.6 600 000 J
- D.3 600 000 J
Answer: D. 3 600 000 J
1 kWh = 1000 W * 3600 s = 3.6 x 10^6 J. So 1 kWh = 1 * 3.6 x 10^6 = 3 600 000 J.
Q2. If a household in a farmhouse near Pune uses 2 kWh of electricity, what is this energy expressed in joules?
- A.7 200 J
- B.14 200 000 J
- C.2 000 J
- D.7 200 000 J
Answer: D. 7 200 000 J
1 kWh = 1000 W * 3600 s = 3.6 x 10^6 J. So 2 kWh = 2 * 3.6 x 10^6 = 7 200 000 J.
Q3. Asha notes that 5 kWh have been consumed; converting to SI units, how many joules is that?
- A.5 000 J
- B.18 000 J
- C.36 000 000 J
- D.18 000 000 J
Answer: D. 18 000 000 J
1 kWh = 1000 W * 3600 s = 3.6 x 10^6 J. So 5 kWh = 5 * 3.6 x 10^6 = 18 000 000 J.
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