Question

One Kilowatt Hour (in commercial use) is commonly known as:
A.\[1{\text{ Unit}}\]
B. \[1{\text{ Faraday}}\]
C. \[1{\text{ curie}}\]
D. None of these

Answer 1

Hint: One Kilowatt Hour is basically the consumption of energy of one Kilowatt in one hour. One Kilowatt per hour is the consumption of one Kilowatt of electric energy in one hour by the electrical appliances of homes or industry. In commercial terms we denote this consumption of electric energy in other terms.

Complete answer:
Since we know that power is the form of energy and thus we can say that one kilowatt per hour is the consumption of electric energy when our electrical appliances work for one hour.Therefore kilowatt is the S.I of power consumption of a particular electrical appliance.

Hence when this electrical appliance consumes power for one constant one hour then it is known that the electrical appliances consume one kilowatt power in one hour. In commercially we usually measure this kilowatt per hour as the number of units. For example:If an electrical appliance consumes one kilowatt hour in an hour then we call it as one unit.

According to this we made the number of units consumed for a particular device. If we say that a particular device makes two units in one hour then it means that it consumes two kilowatt power in one hour. Therefore in commercial use one kilowatt hour is called one unit.

Hence, the correct answer is option A.

Note: Kilowatt hour is denoted by \[kWh\] and it is basically used by the electricity department for making electricity bills. In India, the cost of power consumption is based on the number of unit’s consumed. Thus one unit is equal to one kilowatt of power in one hour.