The commercial unit of electrical energy is kilowatt-hour (kWh), which is equal to
$3.6 imes 10^6$ J
$3.6 imes 10^3$ J
$10^3$ J
1 J
Answer is Right!
Answer is Wrong!
This question was previously asked in
UPSC NDA-2 – 2022
1 kilowatt (kW) = 1000 Watts (W)
1 hour (h) = 3600 seconds (s)
Energy (Joules) = Power (Watts) × Time (seconds)
1 kWh = 1 kW × 1 h = 1000 W × 3600 s = 3,600,000 Joules (J)
In scientific notation, this is $3.6 \times 10^6$ J.