Introduction of Electricity

The Importance And Need For Electricity In Daily Life.

All electrical appliances need electricity in order to function.

Example of electrical appliances :

a) heat energy.

b) sound energy.

c) light energy.

d) mechanical energy.

Electrical Energy Resources :

SEEBECK:

Heat when applied to the tip of two different metal wires will produce a voltage.

PHOTOELECTRIC:

When light is shone onto the surface of selenium, lithium, and semiconductor materials such as silicon, voltage will be generated.

ELECTROMOTIVE:

Current is induced when a  conductor is passed thought a magnetic field.

PIEZOELECTRICITY:

Different strength of pressure exerted on a crystal will generate voltage.

CHEMICAL REACTION:

A chemical reaction between zinc and copper in electrolyte will produce electric charge as in a battery cell.

ELECTROSTATIC FORCE:

Friction between two differenr materials will produce electrostatic force.