Question

I have a resistor marked with colours Red, Blue, Yellow and Gold from left to right. What is its resistance?

• A. $23k\Omega \pm 5\%$
• B. $260k\Omega \pm 5\%$
• C. $620k\Omega \pm 10\%$
• D. $32k\Omega \pm 5\%$

Answer 1

The correct option is B $260k\Omega \pm 5\%$

Do you remember the mnemonic taught in the videos to remember the values of each colour?
It was “BBROY of Great Britain took a Very Good Wicket and won Gold and Silver.”
The first colour is black and stands for 0.
So we have the following bands on the resistor:
Red – 2
Blue – 6
Yellow – 4
$Gold-\pm 5\%$
The bands are in the order – 10’s place, 1’s place, multiplier, tolerance. So we have $26\times {10}^4\pm 5\%\Omega$ as the resistance.