Which one of the following is the value of 1 kWh of energy converted into joules ?
1.8 × 10⁶ J
3.6 × 10⁶ J
6.0 × 10⁶ J
7.2 × 10⁶ J
Answer is Wrong!
Answer is Right!
This question was previously asked in
UPSC NDA-1 – 2018
1 kilowatt (kW) = 1000 Watts (W)
1 hour (h) = 60 minutes * 60 seconds = 3600 seconds (s)
Energy (E) = Power (P) × Time (t)
1 kWh = 1 kW × 1 h = (1000 W) × (3600 s) = 3,600,000 Ws
Since 1 Watt-second (Ws) is equal to 1 Joule (J),
1 kWh = 3,600,000 J = 3.6 × 10⁶ J.
– 1 Watt = 1 Joule per second (1 W = 1 J/s).
– 1 kilowatt = 1000 Watts.
– 1 hour = 3600 seconds.