A current carrying loop consists of 3 identical quarter circles of radius R, lying in the positive quadrants of the x-y, y-z and z-x planes with their centres at the origin, joined together. Find the direction and magnitude of B at the origin.
Current i=17A
As all the segments are quarter circles, the angle made at the center is going to be π/2
Magnetic field due to segment in x-y plane is;
Similarly, because of y-z 
Similarly, because of z-x
So, the resultant is going to be,
1