Question

A carbon resistor is marked with the rings coloured brown, black, green and gold. The resistance in ohm is

• A. $1 \times 10^{6} \pm 10 \%$
• B. $1 \times 10^{7} \pm 5 \%$
• C. $1 \times 10^{6} \pm 5 \%$
• D. $1 \times 10^{5} \pm 5 \%$

Answer 1

Answer: (C)

First colour gives first digit, second colour gives second digit, third colour gives multiplier and Gold gives tolerance.

$\therefore $ Resistance is $10 \times 10^{5} \pm 5 \%=1 \times 10^{6} \pm 5 \%$