When compare AC and DC,
in AC electrons will flow forward as well as backward
 
To identify “Why electrons moving forward and backward?
also, we need to know
“how electricity is generated?”
Generally,
electricity is producing from the AC generator.
Let’s see about
working principle of the AC generator.
In the AC generator,
there are two types of magnets;
such south and north
The rotating coil is kept between these two magnets.
The inner and outer rings are connected at both ends of the coil.
When the coil starts to rotate,
it will contact with both rings
These rings are connected with each
terminal of the electric circuit
and this is called as complete electric circuit.
If the coil is in a static position,
there is a magnetic force between coil magnets
But; if the coil starts to rotate,
then the magnetic force will be converted into
electromagnetic force.
This force is known as the flow of electrons
and it is called electricity.
To rotate this coil,
the external force is a must.
Here; the coil is attached with one end of a connecting rod
and another end of this rod will be connected with the turbine
that will give sufficient external rotational force to turn this coil.
Let’s see “how the turbine gets energy?”
In all thermal power stations,
they will use coal as fuel.
The coal will burn a separate compartment
and from this heat energy,
water will start to heat up.
At high Celsius point, water will start to evaporate.
From this steam pressure energy,
the turbine will start to turn
Whenever the turbine starts to rotate,
then the electricity will be generated.
The electrons that flow in south and north magnets
will flow opposite to each other.
Until; the coil is completed half revolution,
the electrons will flow in one direction
after completion of half revolution
the electrons flow as the reverse.
This process will repeat as a cycle.
For example;
the electrons will flow in one direction
until north side coil moves to the south
and the south side will move to the north,
after its completion of half revolution,
the electrons will flow as reverse
while the north side will move to the south
and south side will move to the north.
Each revolution considers as 180o.
The electrons will change their
flow direction two times
for each one revolution of the coil.
I hope you have understood
“why electrons flow forward as well backward in AC
and also, you have understood
the working principle of AC generator
and generation of Alternate Current.
Let’s come to the electric circuit.
Here; this bulb starts to glow
while electrons flow in one direction,
on the other hand,
it starts to off while electrons flow as the reverse.
But; you can’t see
through your eyes
whether the bulb is glowing or not.
Always, the electricity-producing from AC generator.
To run a generator
there are other types of external energy also used
such as wind mile, tidal energy.
Now; you may have a quire that
“how many times the AC generator rotates per second.
It will rotate 50 to 60 times per second
depends on the country.
It is represented as
50Hz or 60Hz,
which mentioned in AC adapters
and device that runs in the alternate current.
From this video,
we have learned the working principle of AC generator
and electricity generation.
I hope that
you enjoyed this video,
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