Source of electricity

 How electricity formed?

By the force or pressure that pushes or forces electrons to move through the conductor in one direction.

Source of electricity

1. Friction
2. Chemical  reaction
3. Magnetism
4. Heat
5. Light
6. Mechanical pressure 

How above sources of electricity works?

1.Friction

When certain materials are rubbed against each other, for instance, silk and glass rod or when you comb your hair (plastic and human hair).

The atoms of both materials lose or gain an electron hence one of the two materials becomes positively charged and the other negatively charged.

2.Chemical  reaction 

When two pieces of none similar metals are immersed into a chemical solution, the chemical process known as electrolysis will take place between metals and solution.

This will cause one metal to lose an electron and the other to gain and hence pressure of force will be created between the two terminals of metals act as a source of electricity (The device called Cells or battery)

3.Heat

This happens when two dissimilar metals are joined together and the heat energy applied to the junction, one metal will lose electrons, and the other will gain electrons.

4.Mechanical Pressure

Some materials when compressed twisted or bent, the electrons leave on side of the material and accumulated on the other side.

5.Light

When light strikes certain material, for instance, some conductors produce electricity, a photocell is one example of a device that produces an electric charge when struck by the light. this method is known as photo-electric effects.

The photoelectricity effects can be divided  into three ways

• Photoemission eg. X-ray.
• Photovoltaic eg. Solar cell. 
• Photoconductors eg. photodiode.

6.Magnetism

If the conductor is made to rotate when the magnetic field continues free electrons in the conductors will more and more close electric charge at the terminal.