Question

The colour code of a resistor is brown, black and brown. Then the value of resistance is .....

• A. $10\Omega$
• B. $100m\Omega$
• C. 100 + 5%
• D. $0.1k\Omega$

Answer 1

Answer: (D)

Answer is C.

Carbon-composition and carbon film resistors are too small to have the resistance value printed on their housings. Therefore, bands of color are used to represent the resistance value.
The first and second band represents the numerical value of the resistor, and the color of the third band specify the power-of-ten multiplier. The color bands are always read from left to right starting with the side that has a band closer to the edge.
Hence, for a brown, black, brown color code of a resistor. The resistance value is 100 ohms, that is, $0.1k\Omega$.