In the picture shown, we have an effectively infinite wire carrying a current I 1 = 2.60 A flowing from left to right, and a short segment of wire...

In the picture shown, we have an effectively infinite wire carrying a current I1 = 2.60 A flowing from left to right, and a short segment of wire carrying a current I2 = 5.90 A flowing from down to up. The short wire is of length 2L, with L = 2.60 m. Find the magnitude of the torque acting on the second wire due to the first wire. 

http://d2vlcm61l7u1fs.cloudfront.net/media%2F500%2F500e3341-f2a5-411a-98c8-6e3cf839c25b%2Fphpi0PRoj.png