Question

what is the resistance of a carbon resistor whose coloured bands are red, yellow, brown , and white?

Answer 1

Red:2
yellow:4
Brown: multiplier 10
white:silver 10%
so it is 240 ohm +- 10% tolerance resistance

Answer 2

The resistance of a carbon resistor whose colored bands are red, yellow, brown, and white is 24 × 10⁶Ω ± 10%.

• Red stands for 2, yellow for 4, blue for 6, and silver for 5 percent in the color code for carbon resistors.
• The first and second bands correspond to the first two important resistance figures.
• The power raised to 10 in the resistance value is represented by the third band.
• The tolerance is shown by the fourth band.

• Therefore, the resistance of the carbon resistor given is 24 × 10⁶Ω.
• Tolerance in the resistance is given by the white band which would be  10%.
• Hence, the total resistance of the carbon resistor is 24 × 10⁶Ω ± 10%.

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