Resistor

Let us start our Journey of electronics with  simple component called "Resistor"

Resistor:

Resistor is simple component which resist the flow of current(i.e., electrons) through it

due to its resisting capability , it is called as Resistor

SYMBOL

In Electronics World, the symbol used to represent  a Resistor is

OK, if you are new to electronics then u have a doubt .."why this symbol is like this , why it not like a square or a circle".

Let me clear it , Generally in any conducting material  flow of electrons takes place without any  resistance, if we consider a straight line   to be a conductor in which the electrons can flow  easily with out any resistance......whereas in a resistor  speed of electronics get decreased .....instead of representing a complete internal structure  of a resistor in a schematic  we can use a zigzag symbol which serves as best symbol for a resistor.

UNIT

Now we are clear with the symbol...now we can move on to its unit representation

Generally ,in world every material is represented by its units like

liquid.......in Litres

masses......in Kilo grams etc..,

In the same way resistor's resistance has its own unit called "ohms" it is represented as 'Ω'.

HISTORY

Let's get into the history of resistor.....,

A German Physicist and mathematician named Georg Simon Ohm is the one who led to the discovery of resistance.

he conducted many experiments on Electrical circuits and came to a conclusion  that...

"For any particular conductor at a constant temperature, the current that flows through it is directly proportional to the potential difference applied across it."

VαI

V→Voltage

I→current

we can re-write the above as→    V=(some constant)xI

later this constant is termed as the resistance of the circuit by simon ohm

that is  "   V=IR    "

   R→resistance

this called as Ohm's law

a simple circuit representing ohm's law    is as follows

  

where is 'R' is the Resistance offered by the conductor.

Till now we have seen the what is a Resistor...

In next post i will explain how a resistor is manufactured ....till then good bye