What are some of the useful properties of current electricity?

In simple words, current electricity is the flow of electrons through a conductor (wires). Following are the few properties of the current Electricity:

1. Potential Difference (also called as Voltage):
It is the difference in Electric potential between two points. Those two points might be the positive and the negative ends of a battery. Higher the difference, greater will be the energy (potential) of the electrons running through a wire. It is represented by V, and its unit is Volts.

2. Electric Current
It represents the number of electrons (charges) passing by a point per second. Its unit is Ampere, and it is represented by A.

3. Resistance
It represents the opposition that a substance offers to the flow of electric current. Its unit is Ohm, and it is represented by Ω.