Resistor color coding

It’s been a while that I looked at a resistor color code so thought I post the color code so that every one can view it.Â
In simple term, a resistor simply resists the flow of electric current in a circuit. The unit of resistor is ohm. So a bigger resistor value means basically more resistance in a circuit. For example if you connect a battery to electric bulb with 200 Ohms resistor in series, the light emitted will be brighter than if you connect a battery to electric bulb with 2000 Ohms resistor in series. The reason for the later circuit to be dimmer than the first one is simply because of the bigger resistor value which impedes the flow of electric current and thus the light shine less.Â
It is not possible to write the resistor value on a resistor because of its small physical size and so the technique of color code was introduced to display the value of a resistor more readily. The color code basically tells us how to calculate the value of a resistor by reading the color bands on a resistor. In our class a 330 ohms resistor was introduced. Â Let us try to read the resistor value by using the color code. The first thing is to read the color bands by always starting at the opposite side of the GOLD/SILVER/NONE tolerance band. So a 330ohms resistor will be read as
1.Orange    2. Orange   3.Brown. 
From the color chart above we get the following data: 
1^st Color Band = Orange = 3 (1^st band#)
2^nd Color Band = Orange = 3 (2^nd band#)
 3^rd/last Color Band = Brown = 10 (multiplier#) 
Now simply place the 1^st band# (3) side by side with the 2^nd band# (3) which gives 33.
Then multiply 33 with the 3^rd multiplier# (10) which leads to 33 X 10 = 330 OHMS.Â
However, for the colors you normally see in the third band in everyday
life, it’s even easier to think of it as “adding X number of zeroes.”
So for a brown-black-red resistor, you translate into 1-0-2, which
becomes 10 (add 2 zeroes) or 1000.
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If you find it complicated or time consuming you can always search the web for a resistor calculator where you can simply input the color bands and the calculator will calculate the resistor value.
 http://www.webcalc.net/calc/0231.php : Resistor calculator