One Unit of Electric Energy is Equal to (1) One kilowatt Hour (2) One Watt Hour (3) 100 Joules (4) None of the Above

Answer:  (1) One Kilowatt hour

One unit of electric energy is equal to one kilowatt hour (kWh) and in simple words, 1 kWh is the quantity of energy consumed by a 1kW (1000 watt) electric appliance in 1 hour. 

For example ten bulbs of 100-watt light and used for 1 hour to estimate the electricity in unit Kilowatt hour.

1 unit of electric energy is estimated and equal to

1unit = 1Kwh

1kWh = 1kW×1h

1kWh = 1000W × 3600s

1kWh = 3.6 × 10⁶ J