Ok, well I asked this question somewhere else and he said the same answer I wrote on my exam. But I got docked heavily for that. Ok well here's the problem: A negative charge - Q is distributed uniformly over a half circle with radius 'R'. P is at the center of the half circle. A) Show that the electric field at point 'p' is given by E = -(2kQ/πR2)j Magnetic Flux = Integral of E dot da = Q enclosed/Epsilon knott = E is uniform therefore it pops out of the integral and you get E integral of da = Qenclosed/Epsilon knott. Intergration of da is A. So it forms into E dot A = Qenclosed/Epsilon knott. E = -Q/Epsilon knott x 2/Pi r^2 E= -2/Epsilon knott x Q/Pi r^2 What's Wrong with my process because I ONLY got 3/15 on this.