To Measure Resistance using Color Band By Engr

To Measure Resistance using Color Band By: Engr. Irshad Rahim Memon

Calculate the resistance value by 4 -band color coding (Fixed resistor) Calculate the resistance value by 5 -band color coding (Fixed resistor) Measure the resistance by using “Multi meter”

A component that is specifically designed to have a certain amount of resistance is called a resistor. The principal applications of resistors are to limit current in a circuit, to divide voltage, and, in certain cases, to generate heat. Although resistors come in many shapes and sizes, they can all be placed in one of two main categories: fixed and variable. The electronic color code is used to indicate the values or ratings of electronic components, very commonly for resistors, but also for capacitors, inductors, and others.

Color-coding of this form is becoming rarer. In newer equipment, most passive components come in surface mount packages Many of these packages are unlabeled, and those that are labeled normally use alphanumeric codes, not colors. In one popular marking method, the manufacturer prints 3 digits on components: 2 value digits followed by the power of ten multiplier

Thus the value of a resistor marked 472 is 4, 700 Ω, a capacitor marked 104 is 100 n. F (10 x 104 p. F), and an inductor marked 475 is 4. 7 H (4, 700, 000 µH) This can be confusing; a resistor marked 270 might seem to be a 270 Ω unit, when the value is actually 27 Ω (27× 100).

4 -bands Color coding Table:

The first band is the first digit of the resistance value. The second band is the second digit of the resistance value. The third band is the number of zeros following the second digit, or the multiplier. The fourth band indicates the percent tolerance and is usually gold or silver.

First band-1 st digit Second band-2 nd digit Third band-3 rd digit Fourth band-multiplier Fifth band-tolerance

Color Band of 4 -band, 5 -band 6 -band resistors have been verified and observed