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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.