Calculate magnetic induction at point O if the wire carrying
a current I has the shape shown in Fig.

(The radius of the curved part of the wire is equal to R and linear parts of the wire are very long.)

Answer

`[(mu_(0))/(4 pi) (l)/(R) sqrt(pi^(2) + 4), (mu_(0))/(4 pi) (l)/(R) sqrt(1 + (pi + 1)^(2)), (mu_(0))/(4 pi) (l)/(2pi) sqrt(9 pi^(2) + 8)]`