Find the value of resistances for the following colour code.
Find the value of resistances for the following colour code.
i. Blue Green Red Gold
ii. Brown Black Red Silver
iii. Red Red Orange Gold
iv. Orange White Red Gold
v. Yellow Violet Brown Silver
2 Answers
i. Given : Blue – Green – Red – Gold
To find : Value of resistance
Formula : Value of resistance
= (xy × 10z ± T%)Ω
Calculation :
| Colour | Blue (x) | Green (y) | Red (z) | Gold (T%) |
| Code | 6 | 5 | 2 | ± 5 |
From formula,
Value of resistance = (65 × 102 ± 5%) Ω
Value of resistance = 6.5 kΩ ± 5%
ii. Given : Brown – Black – Red – Silver
To find : Value of resistance
Formula : Value of resistance
= (xy × 10z + T%) Ω
Calculation :
| Colour | Brown (x) | Black (y) | Red (z) | Silver (T%) |
| Code | 1 | 0 | 2 | ± 10 |
From formula,
Value of resistance = (10 × 102 ± 10%) Ω
Value of resistance = 1.0 kΩ ± 10%
iii. Given : Red – Red – Orange – Gold
To find : Value of the resistance
Formula : Value of the resistance
= (xy × 10z ± T%)
Calculation :
| Colour | Red (x) | Red (y) | Orange (z) | Gold (T%) |
| Code | 2 | 2 | 3 | ± 5 |
From formula,
Value of resistance = (22 × 103 ± 5%)Ω
Value of resistance = 22 kΩ ± 5%
[Note : The answer given above is presented considering correct order of magnitude.]
iv. Given : Orange – White – Red – Gold
To find : Value of the resistance
Formula : Value of the resistance
= (xy × 10z ± T%)
Calculation :
| Colour | Orange (x) | White (y) | Red (z) | Gold (T%) |
| Code | 3 | 9 | 2 | ± 5 |
From formula,
Value of resistance = (39 × 102 ± 5%) Ω
Value of resistance = 3.9 kΩ ± 5%
v. Given : Yellow-Violet-Brown-Silver
To find : Value of the resistance
Formula : Value of the resistance
= (xy × 10z ± T%)
Calculation :
| Colour | Yellow (x) | Violet (y) | Brown (z) | Silver (T%) |
| Code | 4 | 7 | 1 | ± 10 |
From formula,
Value of resistance = (47 × 10z ± 10%) Ω
Value of resistance = 470 Ω ± 10%
[Note : The answer given above is presented considering correct order of magnitude.]