Based on the colour coding of the given carbon resistor, which of the following represents the correct value of its resistance?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → \( 36\times10^{4}\,\Omega \pm 25\% \)
The colour code of a carbon resistor is read from the end where the bands are closer together: the first two bands give the significant digits, the third band gives the multiplier (a power of ten) and the fourth band gives the tolerance.
The digit values are black 0, brown 1, red 2, orange 3, yellow 4, green 5, blue 6, violet 7, grey 8, white 9.
The value \( 36\times10^{4}\,\Omega \) corresponds to the first digit 3 (orange), the second digit 6 (blue) and the multiplier \( 10^{4} \) (yellow).
\( R = 36\times10^{4}\,\Omega \)
The tolerance is read from the fourth band in the same way, and the option that carries both this value and the tolerance of the given resistor is Option (3).