Now turning to the doctors we will talk about inductions defines physical construction how construction
affects values in Doctor performance with AC and DC counts as you can see here.
This is the inductor symbol and.
And doctors are essentially called a file that are used to store energy temporarily in a magnetic field.
And doctors when combined with capacitors are used in many different kinds of electronic circuits because
of their brutality to oscillate or ring energy in one component feeds Darla back and forth in an oscillating
or ringing manner at a specific frequency.
This phenomenon is called resonance additionally but built in doctors in close proximity with overlapping
magnetic field allow energy to flow from one inductor to the other by inducing a current in the other
conductor.
This is basically how a transformer works.
These concepts are beyond the scope of this basic course.
However the audience should be aware of the basic function of the conductor.
Now there are two fundamental principle of electronics.
One moving electrons create a magnetic field 2 moving or changing and will not take field cause electrons
to move or to move and inductor as a call or fire throw which electron moves.
And energy is stored in the resulting magnetic field like capacitors and doctors to more store energy.
Unlike other stores and doctors store energy in a magnetic field not an electric field.
When the source of electronic electrons is removed the magnetic field collapse immediately
as you can see this is a conductor that has gone on passing through it.
This is the magnetic field.
Now the inductor are simply a the file can be Air One.
Nothing in the middle of the core of the cord.
Just like this one can be formed around a bear.
Maybe it can be wondered out a bit more.
Material material that concentrates magnetic field just like this example or this example can be on
the round a circular form Troy like this one and the second example is this one one.
And if nothing is in the middle it's like this one so depending on the core it can have different personalities
and doctrines as much out in Henry.
Henry is a measure of the intensity of the magnetic field that is produced typical indicate or values
used in electronics are in the range of merely Henry one divide by 1000 and microfilm the one divided
by one or by one million um.
Let's look at the amount of conductance.
Uh as we uh know the amount of everything is affected by a lot of value.
The amount of conductance is influenced by a number of factors.
Number of called in number of these turns diameter of call the diameter of this coil.
This is the diameter from here to here.
Spacing between in the space between each one.
Then on the other side of the world used the size the thickness and the type of material inside the
coin.
So if its air fits Um metal core it will affect the amount of conductance.
As you can see here this is the Air Corps.
This is the iron core.
This is the soft iron on call.
This is a large diameter.
This is a small diameter and this is uh close basing between turns inductor and this is uh wide spacing
between cores and doctor all of these affects the doctrines of an inductor.
Now inductor before months with this occurrence when this current is applied to an inductor the wire
in the inductor momentarily appears as a short circuit and a maximum current flows as the magnetic field
builds charges.
There is a tendency for the current flow to slow down due to an position cause in the charging magnetic
field or the changing will atrophy.
Finally the magnetic field is at its maximum and the current flows to maintain the field as soon as
the current source is removed the magnetic field begins to collapse and creates a rush of current in
the other direction sometimes at very high voltage while conductors performance with AC currents.
When AC current is applied to an inductor during the first half of the cycle the magnetic field builds
as if it were a DC voltage during the second or the next half of the cycle.
The current is reversed and the magnetic field first has to decrease the reverse polarity in step with
the changing current depending on the value of the inductions.
These forces can work against each other making for a less than symbol situation
now because the magnetic field surrounding and inductor can cut across another inductor in close proximity.
The changing magnetic field in one can cause current to flow and the other which is the basic of transformers
as you can see in this example.
This is a simple transformer beds of conductors in close proximity is another bottle use of conductors
and electronics.
Thus will transform other converts hundred twenty volt AC world current into current that will run at
will volt DC radio will use a transformer and other circuits to do that conference.
The conversion is important to go back to the two fundamental principles stated earlier in this unit.
Moving electrons weird magnetic fields and changing magnetic fields cause electrons to move.
This would be a good opportunity to walk your yourself through the process while uh see how transformative
the work in the next lesson we will talk about diodes.
Thanks for watching.
This is education an engineering team.