Electricity is the set of physical phenomena associated with the presence and motion of matter that has electric charge. It allows for brightness at night through electric lights and powers factories and industries. The transportation of electricity is easy once transmission lines are in place. However, electricity is difficult to store on a large scale and there are environmental effects and costs associated with its production and transmission. A circuit includes a device that provides electric current, devices that use the current, and connecting wires. Cells convert chemical energy to electrical energy and batteries consist of groups of cells. Global electricity demand is projected to grow significantly in coming decades.

1. Electricity
By- Kartik Khari 7a

2. Electricity Defintion
• Electricity is the set of physical
phenomena associated with the
presence and motion of matter
that has a property of electric
charge. Electricity is related to
magnetism, both being part of
the phenomenon of
electromagnetism, as described
by Maxwell's equations.

3. Electricity Advantages
• Brightness in the night is only possible by the use
of electricity. Almost all the factories and
industries are running due to electric power. The
advantage of electric power is its reliable and
uninterrupted supply runs the equipment
efficiently and continuously. The transportation of
electricity is easy once the transmission lines are
functional. They work for years and need no or
very less maintenance. The invention of electric
power is one of the best inventions which have
changed human life drastically. It allows people to
do more leisure activities.

4. History
• So it was discovered.However, the term 'electricity' was coined
by a guy called William Gilbert in 1600 to describe static
electricity and there were also two other men, Benjamin
Franklin and Michael Faraday who were at the forefront of its
research and implementation.
• Wilhelm Emil Fein was a German inventor. He invented the
worldwide first portable electric drill.
• Schuyler Skaats Wheeler was an American electrical engineer
and manufacturer who invented the electric fan, an electric
elevator design, and the electric fire engine.
• William Greener was an English inventor and gunmaker. He
developed a self-expanding bullet in 1835, an electric lamp in
1846 some 33 years before Thomas Edison's patent in 1879.

5. Symbols of electric
circuit:

6. Electric circuit
• Electric circuit, path for transmitting
electric current. An electric circuit
includes a device that gives energy
to the charged particles constituting
the current, such as a battery or a
generator; devices that use current,
such as lamps, electric motors, or
computers; and the connecting wires
or transmission lines.

7. Disadvantages
• Disadvantages of Electrical Energy
• Energy Storage. Electricity is difficult to store
on a large scale, which can create challenges
in balancing energy supply and demand. ...
• Production and Transmission Losses. ...
• Environmental Effects. ...
• Costs. ...
• Dependence on Infrastructure.

8. Cell and Battery
• A cell is a single-unit device which converts
chemical energy into electric energy.Depending
on the types of electrolytes used, a cell is either
reserved, wet or dry types. Cell also includes a
molten salt type.
• A battery usually consists of a group of cells.A
battery is either a primary battery or a
secondary battery meaning it is rechargeable or
non-chargeable.

9. • In the Stated Policies Scenario, global
electricity demand grows at 2.1% per year to
2040, twice the rate of primary energy
demand. This raises electricity's share in total
final energy consumption from 19% in 2018
to 24% in 2040. Electricity demand growth is
set to be particularly strong in developing
economies.
Future