Q24
2 kWh = ?
A.
7.2 × 108J
B.
7.2 × 106J
AnswerC.
7.2 × 105J
D.
72 × 106J
Answer: Option B
Solution
Answer: Option B
Solution:
A kilowatt-hour (kWh) is a unit of energy. It is the amount of energy consumed when a power of 1 kilowatt (1000 watts) is used for 1 hour (3600 seconds).1 kWh = 1000 W × 3600 s = 3.6 × 106 J
Therefore,
2 kWh = 2 × 3.6 × 106 J = 7.2 × 106 J
Hence, 2 kWh = 7.2 × 106 joules, so the correct answer is Option B.