Question

why electricity discovered

Answer 1

Electricity is a form of energy and it occurs in nature, so it was not “invented.” As to who discovered it, many misconceptions abound. Some give credit to Benjamin Franklin fordiscovering electricity, but his experiments only helped establish the connection between lightning andelectricity, nothing more.

Answer 2

Italian physicist Alessandro Volta discovered that particular chemical reactions could produce electricity, and in 1800 he constructed the voltaic pile (an early electric battery) that produced a steady electric current, and so he was the first person to create a steady flow of electrical charge.
Electricity is at the heart of many modern technologies, being used for:

electric power where electric current is used to energise equipment;

electronics which deals with electrical circuits that involve active electrical components such as vacuum tubes, transistors, diodes and integrated circuits, and associated passive interconnection technologies.