120 Ohm Resistor color code- Overview
The 120 ohm Resistor color code for 4-band resistor is as shown in the image below:
120 ohm Resistor color code for 4-band is:
[Brown, Red, Brown, Gold]
| Band | Color | Value |
|---|---|---|
| 1st Brown |  | 1 |
| 2nd Red |  | 2 |
| 3rd Brown | | 10 |
| 4th gold |  | 5% |
| 120±5% Ω |
120 ohm resistor color code for 4-band is calculated as:
- (1st digit) = Brown = 1
- (2nd digit) = Red = 2
- (multiplier) = Brown = 1 = 10^1 = 10
- (tolerance) = Gold= ±5%
∴ 12×10±5% –> 120 ohms –> 120 Ω
∴ the real value of 120 ohm resistor is between 114 Ω to 126 Ω
Description: From the resistor color code table we need to find the color code of resistor with respect to its decimal value of the each band counted from left to right.
Thus, for 120 ohm resistor, 1st digit is ‘ 1 ‘, ∴ look for color in a chart with value 1, then it’s your 1st color(say brown).
The next 2nd digit is ‘ 2 ‘, ∴ look for color in a chart with value 2, then it’s your 2nd color (say red).
Next 3rd digit ‘1’ (but value 10^1 = 10) is multiplier ‘ 10 ‘, ∴ look for color in a chart with value 1, then it’s your 3rd color band (say brown).
- The last bands in 4th and 5th bands resistors gives the tolerance value of the resistor. Here, the Gold indicates a 5% tolerance of the resistor value. For Silver, it is 10%, and Brown it is value points at 1% tolerance value. If the 4th band is absent then it is assumed as 20%tolerance.
check color code of 150 ohm resistor
