Question

Distinguish between Kilowatt and Kilowatt-hours.

Answer 1

In this question, we need to differentiate between Kilowatt and Kilowatt-hours. For this, we will use the definition and some of the properties for both of the terms.

Complete step by step answer: The product of the voltage and current results in the Power of the device. Mathematically, $P = VI$ where ‘V’ is the voltage across the element, and ‘I’ is the current through the element in which we need to determine the Power consumed or delivered. It is measured in Watts and is denoted by the letter ‘W’. Kilowatts the combination of 1000 watts. Mathematically, $1000{\text{ watts}} = 1{\text{ kwatts}}$. In general, all the active sources deliver the Power to the elements connected to it, and the passive sources absorb the Power through the active sources.
The product of voltage, current, and time results in the energy consumed by the device in the time period. Mathematically, $E = VIt$. It is measured in Kilowatt-hour and is denoted by ‘KWh’. Also, the one-kilowatt hour is equivalent to one joule of energy.
In other words, the rate of power consumption in an element is known as energy. Mathematically, $P = \dfrac{E}{t}$.
The electric meters established in our homes (either analog or digital) measure the kilowatt-hours of the energy consumed by us in using different electrical appliances.

Note: It is interesting to note here that both the units, i.e., Kilowatts and Kilowatts-hour, measure the electricity but kilowatt-hours signifies the total amount of electricity through the element in ‘t’ hours.