In this lecture, I am going to teach you all about serious circuits.
A serious circuit is a circuit has a circuit elements or connected together one after another in a single
loop.
So we have example of serious circuit here consists of battery ammeter switch resistor indicator lamp.
They are connected one after another.
This ammeter is connected after the battery switch is connected.
After emit resistor is connected.
After Emit lamp is connected after a meter.
If we removed the meter from the circuit so the lamp will be connected after the resistor and this lamp
is connected after this lamp.
So you will see here every element has two terminals.
The battery has positive terminal and negative terminal.
Ammeter has two terminals, one connected to the battery, and the second terminal is connected to the
first terminal of the switch.
The next component, the second terminal of the switch, is connected to the first terminal of the next
component, which is it?
The second terminal of the emitter is connected to the first determiner of the next component, which
is the resistor, so on.
There is only one path for current to flow.
So in the third circuit the current will flow from the positive terminal of the battery through all
of these elements this way and return it back to the negative of that DC source.
So there is only one closed path here for the current to flow.
The amount of current in a series circuit is the same through any component.
So I connected a meter before and after each element to measure the amount of current.
The current entering the element will be the same value as the current leaving either element or not.
And the next element also so current i.e. one leaving the battery and entering the switch equal to the
current, leaving the switch by two and entering the resistor or one and the current.
Enter this resist through a to equal to the current, leaving this resistor by three and the current
leaving this resistor and entering this indication lamp by three equal to the current leaving this indicator
lamp i4 so on.
So the current in series circuit is constant.
I want equal to I two equal to three equal to I for equal to I five equal to I six equal to the current
of the DC source insert circuit.
If any component is damaged or is open, the current in the circuit will stop.
So if I opened this switch it is a closed a switch.
I will change its position from closed from on position to off position to open.
So the current will stop here at the terminal here and will not be able to flow and to continue its
path and return back to the negative.
So that circuit is not closed anymore.
It is open if this resistor get damaged.
So the current will stop here at the first terminal and it will not continue flowing because open circuit,
if I removed this indicator lamp from the circuit, well what will happen.
The current will stop at the first terminal of this indicator and lamp and will not continue to flow
it become open circuit.
And of course if I remove this lamp and the current stop here, this lamp will be turned off and this
will be off.
Also, they will not light up because the current not flowing through this.