Question

A carbon resistor has coloured strips as shown in figure. What is its resistance value with tolerance?

• A. $52\times {10}^3\Omega \pm 5\text{\%}$
• B. $25\times {10}^3\Omega \pm 5\text{\%}$
• C. $25\times {10}^4\Omega \pm 10\text{\%}$
• D. $52\times {10}^4\Omega \pm 10\text{\%}$

Answer 1

The correct option is B $25\times {10}^3\Omega \pm 5\text{\%}$

According to color coding,

$\text{Red}=2;\text{Green}=5\text{Orange}=3;\text{Gold}=\pm 5\%\text{(tolerance)}$

$R=xy\times {10}^z\pm \text{(tolerance)}$

$\Rightarrow R=25\times {10}^3\Omega \pm 5\%$

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Hence, $\left(B\right)$ is the correct answer.