Two wires `A` and `B` are of lengths `40cm` and `30cm`. A is bent into a circle of radius `r` and `B` into an arc of radius `r`. A current `i_(1)` is passed through `A` and `i_(20)` through `B`. To have the same magnetic inductions at the centre, the ratio of `i_(1):i_(2)` is

Options

A. `3:4`
B. `3:5`
C. `2:3`
D. `4:3`

Answer

1

Explanation

`B_(1)=B_(2)`