An infinitely long conductor PQR is bent to form a right angle as shown in figure. A current I flows through PQR. The magnetic field due to this current carrying conductor at the point M is `B_(1)`. Now, another infinitely long straight conductor QS, is connected at Q so that the current is halved in QR as well as in QS, the current in PQ remaining unchanged. The magnetic field at M is now `B_(2)`. The ratio `""^(B_(1))//_(B_(2))` is given by

Options

A. `½`
B. 1
C. `⅔`
D. 2

Answer

C