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Explain the color coding of carbon resistors.

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Explain the color coding of carbon resistors.
asked Jul 25, 2014 in Physics by sohandash (240 points)

1 Answer

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Carbon-composition and carbon film resistors are too small to have the resistance value printed on their housings. Therefore, bands of color are used to represent the resistance value. For carbon-composition and carbon film resistors, the common tolerances are 5%, 10%, and 20%, indicating that the actual value of the resistor can vary from the nominal value by ±5%, ±10% and ±20%. If the band is gold, it specifies a 5% tolerance; silver specifies a 10% tolerance; if no band is present, the tolerance is 20%.
colorcode
 

 

answered Jul 28, 2014 by admin (4,920 points)

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