What is Resistor, Conductance? and Color coding of Resister

Friday, 23 December 2016

What is Resistor, Conductance? and Color coding of Resister

What is Resister?
Definition of Resister:

Resistor is an electronic device which opposes the flow of current. It reduces the magnitude of the total current passing through the resistor.If resistance increases , current(i) decreases Clearly to say both are inversely proportional to each other.Resistor is designated by the letter "R".

Units of resistance is "ohms".

Definition of Conductor:

Inverse of resistance is conductance. It is denoted by the letter "G".

Units of conductance is "mhos".

Relation b/w Resister and Conductance -> R = 1/G

It is generally made of Nickel-Chromium alloys and the core is of fiber glass or ceramic.
A resistor can be identified by color coding present on it.
Each resistor contains 3 or 5 0r 7 strips on it.

Color Coding Of Resister:

"A resistor consists of colour bands on it. A resistor's value can be known by seeing its colour coding.A resistor consists of combination of colours .Generally 10 colours are used to design a resistor.Each colour has some fixed value of resistance".