Resistors limit current on a circuit. How can we read a resistor? It is very easy. On the resistor, there are several colors. Color used are black, brown, red, orange, yellow, green, blue, violet, gray, and white.
 This resistor has colors of red, orange, green, and gold. Resistance can be calculated by R = (First digit * 10 + second digit) * multiplier. Therefore, R = (Red * 10 + Orange) * Green = (2 * 10 + 3) * 100,000 = 230,000 ohm. Tolerance of silver is + 10 % Tolerance of gold is + 5 %.
 Here is the color table for calculating resistance:

 Color 1st digit 2nd digit Multiplier Tolerance Black 0 0 1 Silver/Gold Brown 1 1 10 Silver/Gold Red 2 2 100 Silver/Gold Orange 3 3 1000 Silver/Gold Yellow 4 4 10000 Silver/Gold Green 5 5 100000 Silver/Gold Blue 6 6 1000000 Silver/Gold Violet 7 7 10000000 Silver/Gold Gray 8 8 100000000 Silver/Gold White 9 9 1000000000 Silver/Gold

 Example ProblemsWhat is the resistance of each resistor? ohm ohm ohm ohm ohm ohm ohm ohm

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