In the picture below it is asked that i calculate the resultant electric field if the linear charge density is known.
Calculate the resultant electric field of a charged semicircle wire (positioned as in the picture) at some point M on the Z axis if the linear charge density of the wire is known ( wire is thought to be infinetly thin. )
3. The Attempt at a Solution [/B]
I calculated the projections but the part ( which i circled ) is the solution from the book. That has to be wrong right? When we replace the linear charge density expression the π is squared not lost?
[Mentor note: Added OP's text description of the problem statement, moved the image to be inside the problem statement section.]
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