1 Kilowatt hour is equal to:
2024
1 Kilowatt hour is equal to:
- A.
3.6 × 10⁵ Joule
- B.
10³ Joule
- C.
3.6 × 10⁶ Joule
- D.
36000 Joule
- E.
Question not attempted
Attempted by 285 students.
Show answer & explanation
Correct answer: C
1 Kilowatt hour (kWh) is a unit of energy representing the work done by 1000 watts of power over one hour. Since 1 watt equals 1 joule per second, and there are 3600 seconds in an hour, we calculate: 1 kWh = 1000 watts × 3600 seconds = 3,600,000 joules. In scientific notation, this is expressed as 3.6 × 10⁶ Joules.