Two resistances A and B have colour codes orange, blue, white and brown, red, green, respectively. Then, ratio of their resistances A: B is

Step-by-step solution

Using colour code for carbon resistor, (For A) array ccc Orange & Blue & White & & 3 & 6 & 9 array R_ A =36 10⁹ Similarly, ( For B) array ccc Brown & Red & Green & & 1 & 2 & 5 array R_ B =12 10⁵ R_ A R_ B = 36 10⁹ 12 10⁵ =3 10⁴ R_ A : R_ B =3 10⁴: 1