What is the Magnetic Field at Point P in Figure (e)?

[musiliu]

Homework Statement

#32, figure (e)

http://www.physics.sfsu.edu/~nlepeshk/230/28_32.pdf"

Homework Equations

B_{infinite line} = u₀ I / 2 pi r_{perpendicular}

B_circle = u₀ I / 2R

The Attempt at a Solution

should I assume that the two horizontal lines are semi-infinite lines?
if so, then

B_total = (1/2) B_circle + B_{infinite line} (2 semi-infinite)

and direction is into the board right?

 

[collinsmark]

should I assume that the two horizontal lines are semi-infinite lines?
if so, then

B_total = (1/2) B_circle + B_{infinite line} (2 semi-infinite)

and direction is into the board right?

Yes, and yes, sound reasonable to me.