Question

A carbon resistor has a tolerance of 20\%. As per the colour codes of resistors, the last band in that resistor is

• A. silver
• B. absent
• C. red
• D. gold
• E. blue

Hint:

When you see no colour band on a resistor, the tolerance is 20\%. For other common tolerance values, gold corresponds to 5\% and silver to 10\%.

Answer 1

The Correct Option is B

In the colour code for carbon resistors, the first three bands represent the digits of the resistor value, and the fourth band represents the tolerance. For carbon resistors: - A tolerance of 20\% corresponds to no colour band (or absent). - A gold band indicates a tolerance of 5%. - A silver band indicates a tolerance of 10\%. Thus, for a resistor with a tolerance of 20\%, the last band would be absent. Hence, the correct answer is (B) absent.