`A` and `B` are two concentric circular conductors of centre `O` and carrying currents
Channel: Doubtnut
Date: 19/01/2020

`A` and `B` are two concentric circular conductors of centre `O` and carrying currents `i_(1)` and `i_(2)` as shown in the adjacent figure. If ratio of their radii is `1:2` and ratio of the flux densities at `O` due to `A` and `B` is `1:3`, then the value of `i_(1)//i_(2)` is