Question

The unit of electric power is:
A. watt (W)
B. kilowatt-hour (kWh)
C. joule (J)
D. watt-sec (W.s)

Answer 1

Hint: Electric power is the rate, per unit time, at which electrical energy is moved by an electric circuit. The SI unit of the power is the watt, one joule for every second.

Complete step-by-step answer:
The correct answer is A.

Electric power is normally delivered by electric generators, however can likewise be provided by sources, for example, electric batteries. It is typically provided to organizations and homes (as household mains electricity) by the electric power industry through an electric power framework.

Watt is the unit of power whereas kilowatt-hour (kWh) is the unit of energy. Watt indicates the rate of using energy in J/s. You can compare this to how fast water is flowing out of a water pipe. If you have a Light bulb that has a rating of 100 watts, it means that the light bulb consumes 100 J per second.

Electric power can be conveyed over long separations by transmission lines and utilized for applications, for example, motion, light or heat with high efficiency.

Electric power, as mechanical power, is the pace of accomplishing work, estimated in watts, and spoke to by the letter P. The term wattage is utilized casually to signify "electric power in watts." The electric power in watts delivered by an electric flow I comprising of a charge of Q coulombs each t seconds going through an electric potential (voltage) distinction of V is:
$P=\dfrac{VQ}{t}$

Note: Electric power is changed to different types of energy when electric charges travel through an electric potential (voltage) distinction, which happens in electrical parts in electric circuits. From the point of view of electric power, parts in an electric circuit can be partitioned into two classifications:
Passive gadgets (loads)
Active gadgets.