Question

Brown, Red and Orange coloured bands on a Carbon resistor are followed by silver band. The value of resistor is ________

• A. $320\Omega \pm 5$%
• B. $12k\Omega \pm 5$%
• C. $320\Omega \pm 10$%
• D. $12k\Omega \pm 10$%

Answer 1

Answer: (D)

$12k\Omega \pm 10$%

The Color Coding of the resistances is given by:

Black Bown Red Orange Yellow Green Blue Violet Grey White

0 1 2 3 4 5 6 7 8 9

Tolerance:

Gold Silver No color

5% 10% 20%

So, according to the color-coding,

$R=AB\times {10}^C\pm D$

Here, A is the first color, B is the second color, C is the third color and D is the strip of the tolerance.

So $R=12\times {10}^3\pm 10\%$

$⟹12k\Omega \pm 10\%$

So option $D$ is correct.