Whats the resistance of a resistor color coded yellow, violet and red?
Yellow is the first color so the first number is 4. Violet is the second color, so the second number is 7. Since the third color is red, the multiplier is 100. Therefore, the resistance is 47 x 1000 or 4700 Ohms. No fourth color band means the actual resistance is 4700 +/- 20%. 20% of 4700 is 940. Therefore, the actual value is between 3760 and 5640 Ohms. Example: • First color is red which is 2 • Second color is black which is 0 • third color is yellow which is 10,000 • Tolerance is silver which is 10% Therefore the equation is: 2 0 x 10,000 = 200,000 Ohms The fourth band is is silver which means the actual resistance is 200,000 +/- 10%. 10% of 200,000 is 20,000. Therefore, the actual value is between 180,000 and 220,000 Ohms.
