Question

A carbon film resistor has colour code Green Black Violet Gold. The value of the resistor is

• A. $50\, M \Omega$
• B. $500\, M\Omega$
• C. $500 \pm 5 \% M \Omega$
• D. $500 \pm 10 \% M \Omega$

Answer 1

Answer: (C)

$500 \pm 5 \% M \Omega$

Answer 2

Corresponding to the colours of the first and second bands green and black, the figures are 5 and 0 .
Corresponding to the colour of third band, violet, the multiplier is $10^{7}$. Therefore, the value of the resistance is $50 \times 10^{7} \Omega$. The Gold colour of the fourth band, indicates the tolerance of $5 \%$
So, the value of the resistor is written as
$50 \times 10^{7} \Omega \pm 5 \% =500 \times 10^{6} \Omega+5 \%$
$=500 \pm 5 \% M \Omega$