Electrical Engineering XYZ MCQ on kilowatt hour is unit of
kilowatt hour is unit of:
- Power
- Energy
- Charge
- Volts
Correct answer:
The correct answer is: 2. Energy
Explanation:
- Power is the rate at which energy is used or produced. It is measured in watts (W) or kilowatts (kW). Power is not the total amount of energy; it’s the amount of energy used or produced per unit of time.
- Energy is the total amount of work done or the total amount of a particular type of energy in a system. It is measured in joules (J) or, in the case of larger quantities, kilowatt-hours (kWh). The kilowatt-hour is a unit of energy equivalent to one kilowatt of power used for one hour.
- Charge is a property of matter, specifically related to the existence of charged particles (like electrons and protons). Charge is measured in coulombs (C) and is not the same as energy.
- Volts is a unit of electric potential or electromotive force. It measures the electric potential energy per unit charge. Volts are not a unit of energy; they are a measure of the electric potential difference.
In summary, a kilowatt-hour is a unit of energy, representing the total amount of energy consumed or produced over a period of one hour at a rate of one kilowatt.