RESISTANCE COLOR CODE

One of a important think in practical electronics is resistance color code used to show the value of a resistance. Value of a resistance is expressed in color band on a resistor. Different color gives the digits of the value of the resistance. Generally 4-band and 5-band resistances are available. For a 4-band resistance first 2-band give the numeric value and the third band is the power of the 10. This is same for the 5-band resistance. The last band is the tolerance band. Different tolerance are 20%,15%,10%,5%,2%,1% and .5% are available. The less the tolerance the more the price of it.