What is the meaning of colour coding resistor ?

Colour Codes for Resistors

 Resistors are of the following two major types :

 (i) wire-bound resistors and  (ii) carbon resistors

The first type of resistor is nichrome, manganin, Constantin, etc. Materials are selected so that their resistivity is relatively insensitive to temperature. With carbon resistors, carbon-containing the appropriate binder is molded into the cylinder. The lead wire is Attached to this cylinder, the entire resistor is encased in a ceramic or plastic jacket. Two leads Carbon resistors are compact and inexpensive.  Their values are given using a color code.

       

COLOUR	NUMBER	MULTIPLIER
Black	0	1
Brown	1	10
Red	2	102
Orange	3	103
Yellow	4	104
Green	5	105
Blue	6	106
Violet	7	107
Grey	8	108
White	9	109
Gold		10-1
Silver		10-2
No Colour

                                 

The resistor has a set of 4 (or 3) coaxial colors. The rings whose importance is listed in the table above. The colors are written from left to right

Colour 1 → First significant figure

Colour 2 → Second significant figure

Colour 3 → Decimal multiplier

Colour 4 (or no colour) → Tolerance or possible variation in percentage.

Let me know if you have more questions or if there is a specific topic that you would like to know more about.