Question

The unit in which the domestic electric meters measure the electrical energy consumed and its value in SI unit is:

• A. Kilowatt-hour (kWh) and 1 kWh = 3.6 X 10⁶J
• B. Watt-hour (Wh) and 1 Wh = 3.6 X 10³J
• C. Joule and 1KJ = 1000J
• D. Joule and 1 J =1000kJ

Answer 1

The correct option is A

Kilowatt-hour (kWh) and 1 kWh = 3.6 X 10⁶J

Kilowatt-hour (kWh) is the commercial unit of electrical energy and 1 kWh =1000 W x 3600 s = 3.6 X 10⁶J