Question

Choose the correct answer from the alternatives given in the brackets.
kilowatt-hour is the unit of ..............
(potential difference, electric power, electric energy, charge)

Answer 1

kilowatt-hour (kWh) is the unit of electric energy. It is the commercial unit of electrical energy.

$1kWh=3.6\times {10}^{6}J$

The electric energy used in houses, factories etc. is measured in kilowatt hour. The cost of electric current is also fixed per one kilowatt hour. One kilowatt hour of electric energy is called one 'unit'.