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Find the resistance value of the carbon resistor if the colors of the four bands are red, red, red and silver respectively.

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Find the resistance value of the carbon resistor if the colors of the four bands are red, red, red and silver respectively.

(a) 33 × 10^2Ω ± 20%

(b) 22 × 10^2Ω ± 5%

(c) 22 × 10^2Ω ± 10%

(d) 33 × 10^3Ω ± 10%

I got this question in an online interview.

Query is from Current Electricity in portion Current Electricity of Physics – Class 12

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Correct choice is (c) 22 × 10^2Ω ± 10%

To explain: A color code is used to indicate the resistance value of a carbon resistor and its percentage accuracy. The corresponding value of resistance for the given color code is 22 × 10^2 Ω ± 10% (Red-2; Red-2; Red-2; Silver-10%).

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