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How do you calculate the value of a resistor?

Answer 1

Always read resistors from left to right. - Resistors never start with a metallic band on the left. If you have a resistor with a gold or silver band on one end, you have a 5% or 10% tolerance resistor. Position the resistor with this band on the right side and again read your resistor from left to right.Apr 29, 2017

How to Read Resistor Color Codes | Arrow.com

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Calculating Resistor Values

For example, a resistor has the following coloured markings; Yellow Violet Red = 4 7 2 = 4 7 x 10² = 4700\u03a9 or 4k7 Ohm. The fourth and fifth bands are used to determine the percentage tolerance of the resistor.