One kilowatt-hour is otherwise known as one unit of electrical energy. One kilowatt-hour means that electric power of 1000 watt has been utilized for an hour.
$1 kWh =1000$ watt-hour $=1000 \times(60 \times 60)$ watt-second $=3.6 \times 10^6 J$
The SI unit of electric power is watt. When a current of 1 ampere passes across the ends of a conductor, which is at a potential difference of 1 volt, then the electric power is P = 1 volt × 1 ampere = 1 watt.
1. The SI unit of electric potential or potential difference is volt (V). 2. The potential difference between two points is one volt if one joule of work is done in moving one coulomb of charge from one point to another against the electric force. $ 1 \text { volt }=\frac{1 \text { joule }}{1 \text { coulomb }} $
When a steady current flows in a conductor of non-uniform cross-section will the charge passing per unit time depend on area of cross section of the conductor?
Answer
When a steady current flows in a conductor of non-uniform cross-section will the charge passing per unit time depend on area of cross section of the conductor?