Resistor colour Code of learn.

Resistor Colour Code of learn.
 

HOW TO REMEMBER THE COLOUR CODE

Resistance colour     value   

    black                       0   
    brown                      1
    red                           2                                           
   orange                      3                                  
    yellow                     4   
    green                       5   
    blue                         6
    violet                       7     
    gray                         8     
    white                       9
    silver                      -2   
    gold                        -1

 
      Here are some common ways to remember the colour code:
    
     Resistance is measured in OHMs.
     
 Resistors have RESISTANCE and the main purpose of a resistor is to reduce the CURRENT FLOW.

    "Ohm." but this symbol is not available on some word-processors, so the letter "R" is used. 
 The letter "E" is also sometimes used and both mean "Ohms."

    A one-ohm resistor is written "1R" or "1E."  It can also be written "1R0" or "1E0."
    
    A resistor of one-tenth of an ohm is written  "0R1" or "0E1."  
 The letter takes the place of the decimal point.
    10 ohms  =  10R
    100 ohms = 100R
    1,000 ohms = 1k (k= kilo = one thousand)
    10,000 ohms = 10k
    100,000 ohms = 100k
    1,000,000 ohms = 1M   (M = MEG = one million)

    Every resistor is identified by colour bands on the body, but when the resistor is a surface-mount device, numbers are used and sometimes letters.
    You MUST learn the colour code for resistors.
      
    Reading 4-band resistors.
    The most "common" type of resistor has 4 bands and is called the 10% resistor.
 It now has a tolerance of 5% but is still called the "10% type" as the colours increase by 20% so that a resistor can be 10% higher or 10% lower than a particular value and all the resistors produced in a batch can be used.

    The first 3 bands produce the resistance and the fourth band is the "tolerance" band. Gold = 5%
    (Silver =10% but no modern resistors are 10%!! - they are 5%  2% or 1%