Question

Find the resistance value of the carbon resistor if the colors of the four bands are yellow, violet, brown and gold respectively.

(a) 47 × 10^1Ω ± 5%

(b) 47 × 10^0Ω ± 5%

(c) 47 × 10^6Ω ± 5%

(d) 47 × 10^2Ω ± 5%

This question was posed to me in exam.

This interesting question is from Current Electricity in chapter Current Electricity of Physics – Class 12

Answer 1

The correct option is (a) 47 × 10^1Ω ± 5%

The explanation is: 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 47 × 10^1Ω ± 5% (Yellow-4; Violet-7; Brown-1; Gold-5%).