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Electronic Lab - Resistors


2. Color Code Rings on Resistors

Determine the Resistance of a Resistor by its Color Coded Rings, use Table I below.

1.Turn the resistor so the gold or silver stripe is at the right end of the resistor.
2.The first two stripes on the left correspond to the first two digits of the resistance value.
3.The third stripe from the left corresponds to a multiplication value.
4.Multiply the two-digit number from step 2 by the multiplier of step 3. This number is the value of the resistance in W.

The 4th ring indicates the accuracy of the resistor. (e.g. A gold stripe means that the value of the resistance may vary by 5% from the value given by the first three stripes.)


<table I>

Example

First stripe is YELLOW. ----> 4
Second Stripe is BLUE. ----> 6
Third Stripe is RED. ----> x 100
Therefore the resistance is 46 x 100 = 4600W
(or 4.6 KW).
Furthermore, if the last band is Silver,
you can expect that the actual value might
deviate by as much as 10% of 4.6KW
(or by as much as 460 W!)


 
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