1. The problem statement, all variables and given/known data A charge Q is distributed evenly on a wire bent into an arc of radius R, as shown in the figure below.What is the mathematical expression that describes the electric field at the center of the arc (point P indicated) as a function of the angle θ? Sketch a graph of the electric field as a function of θ for 0 < θ < 180. I added the figure for the question as an attachment. 3. The attempt at a solution lambda=Q/pi R dE= kdQ/R^2 dE= (kdQ/R^2) cos θ dQ=lambda dl dl= Rd theta dQ=lambda R dθ dE=(k[lambda R d θ]/R^2)cos θ E=(k lambda R cos θ/R^2)d θ(from pi/2 to -pi/2) E=k lambda/R cos θ dθ E=k lambda/Rsin θ E=k lambda/R[sin(pi/2)-sin(-pi/2)] E=k lambda/2R E=k(Q/piR)/2R=2kQ/piR^2 E= 2kq/piR^2 Is this right? I used K for 1/4pi(E) to make it easier to type. Also i am kind of lost on what is expected for the sketch.