220 ohms with a 10 percent tolerance. Red is 2 and brown is 1. Brown is in the multiplier band so it is 10 times the value in the first two bands. Silver is in the tolerance band. Gold would have been a %5 tolerance device.
.22 ohms
Thecolorcode of 2.2 ohms resistor is red red yellow silver.
Green, Black, Orange, (gold / silver) Green = 5 Black = 0 Orange = x10^3 50x10^3 = 50,000 or 50k Ohm
Green Red Brown
Three red color bands indicate a resistor value of 2,200 ohms (2.2 kohms)
A 2.2 k resistor would be banded red, red, red, and possibly other bands depending on tolerance, etc. The first two bands, red and red, mean 2 and 2. The third band means 2 zeros. The result is 2200. 0 black 1 brown 2 red 3 orange 4 yellow 5 green 6 blue 7 violet 8 grey 9 white Fourth band: none 20% silver 10% gold 5% If the third band is gold or silver, then the multiplier is 0.1 or 0.01, respectively. For example, red, red, silver means 0.22 ohms.
15 k ohms with a 10% tolerance.
brown, red, brown, silver = 120 ohms
On a color coded resistor, there are normally four color bands. The first three represent the value of the resistor and the fourth represents the tolerance of the resistor, i.e. the acceptable variation as a percentage from the stated value. No fourth band allows +/- 20% Silver allows +/- 10% Gold allows +/- 5% Red allows +/- 2% Brown allows +/- 1%
Thecolorcode of 2.2 ohms resistor is red red yellow silver.
The first band, brown, indicates the digit 1.The second band, red, indicates the digit 2.The third band indicates the multiplier. For yellow, this is 10000.12x10000 = 120,000 ohms.The last band is an indication of the tolerance of the resistor; gold means the actual value is within 5% of the stated value.
That would be a 200 Ohm resistor, and you didn't mention the tolerance, so I'm guessing you didn't see another band which means the tolerance would be at 20%
To identify the value of a carbon resistor using colour code use the following table...0 - Black1 - Brown2 - Red3 - Orange4 - Yellow5 - Green6 - Blue7 - Violet8 - Grey9 - White... and look at the bands. The first two bands will be the digits, and the third band will be the multiplier. For instance, Brown - Red - Orange will be 12000 ohms, where the 1 is the first band, the 2 is the second band, and the three 0's is the third band.If the third band is Gold or Silver, then the multiplier is 0.1 or 0.01 respectively. For instance, Brown - Red - Gold would be 1.2 ohms, and Brown - Red- Silver would be 0.12 ohms.If there is no fourth band, the resistor is +/- 20%. If the fourth band is Silver, the resistor is +/- 10% and, for Gold, +/- 5%.Some high end resistors have more bands. The 1% resistor will have a third digit band, and some resistors will have a band indicating temperature coefficient.
Resistors have standard colors for identification of the resistance value. In order, the colors are: black, brown, red, orange, yellow, green, blue, violet, gray, and white. Reading resistors is a very simple procedure if you use the chart and formula below. Hold the resistor with the gold or silver band to the right and read the resistor from the left to the right. http://www.westfloridacomponents.com/reschart.html
Green, Black, Orange, (gold / silver) Green = 5 Black = 0 Orange = x10^3 50x10^3 = 50,000 or 50k Ohm
Green Red Brown
Yellow is 4, Violet is 7, Violet is 7, Gold is 5% tolerence. 470,000,000 Ohms.
It is brown, green, red, and gold. See the related link.