Electricity:

A form of energy resulting from the existence of charged particles (such as electrons or protons), either statically as an accumulation of charge or dynamically as a current is known as electricity. There are two types of electricity they are:

a) Static electricity (Electrostatics): 

 Electrostatics is the study of electric charges at rest. Here we study the forces, fields and potentials associated with a static charge. 

b) Current Electricity:

The study of electric charges in motion is called current electricity. 

Electric Field:



Carrier of current:

The charged particles which by flowing in definite direction set up an electric current are called current carriers. the different types of current carriers are as follows:

In solid :

In metal, the electric current is due to the flow of electrons.

In semiconductors, electrons and holes are the charge carriers.

In liquid :

In electrolytic liquids, the charge carriers are positively and negatively charged ions. 

In gases:

In ionized gas, positive and negative ions and electrons are the charge carrier.