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Theory:

Have you ever imagined a life without electricity?

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Electric sparks between two wires

It is actually difficult to lead our lives without electricity.

When we turn 'on' the switch in our rooms, the bulb quickly shines. Our room heater generates heat when it is connected to the pins on the walls. The torch glows when a button is clicked. In all these actions, we use electricity, which makes our work easier.

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A torch

Electricity is the most convenient and controllable form of energy. In modern society, it is not easy to lead our life without electricity. From a small phenomenon like lighting our houses to huge engineering applications, electricity plays an integral part. Without electricity, most of our daily activities would come to a halt. So, it is essential to know its origin, characteristics and utilisation.
Electric charge:
The origin of electricity lies in electric charges.
Electric charge is one of the basic fundamental properties of all matter, like mass and volume. Coulomb is the unit of measurement for electric charge, and it is denoted as '\(C\)'.
The charge of an electron (\(e\)) has a very small numerical value. The fundamental unit of electron charge (\(e\)) is equal to \(1.6\ C\). It means that any charge (\(q\)) must be an integral multiple (\(n\)) of the fundamental unit of electron charge (\(e\)).
Then, the formula is written as
 
\(q = ne\)

Where \(q\) is the charge, \(n\) is a whole number, and \(e\) is the charge of an electron. Using the above formula, one can calculate the number of electrons present in a coulomb of charge.
 
Calculation of electrons present in one coulomb of charge:
 
Charge of \(1\) electron,
 
e=1.6×1019C
 
The formula is,
 
q=ne (or) n=qe
 
Therefore, the number of electrons in \(1\ coulomb\),
 
n=11.6×1019n=6.25×1018electrons
What is electricity?
Electricity is a branch of physics that deals with the flow of electric charges through a conductor.
Electricity is classified into two parts. They are,
  1. Static electricity
  2. Current electricity
 
1. Static electricity:
The study that deals with the electric charges at rest and their effects are known as electrostatics or static electricity.

2. Current electricity:
The study that deals with the electric charges in motion and their effects are known as current electricity.
In this topic, we will learn and understand the concept of current electricity and its applications.
 
Power of electricity:
Have you ever watched a thunderstorm with mighty lightning bolts from the sky?

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Lightning bolts
\(\)
A lightning bolt is a sudden, massive surge of electricity between the clouds or sometimes between the sky and the ground. The electrical energy produced by a single lightning bolt is enough to light a \(100\ -watt\) lamp.