(Just for number 1 only - finding electric field) [/B]
dE = k dq/R^2
sin theta = y/R = y / sqrt (a^2 + y^2)
The Attempt at a Solution[/B]
I'm confused at the point of calculating the integral from -L/2 to L/2. I got the final integral solution from the "Special integrals table". Are my steps correct for the problem?...for some reason I keep getting zero for my answer and it just doesn't seem correct. Thank you!