Answers for Assignment 1

Problem #1.

F2 = - F3 implies that q1 = - 4 q 2


Problem #2.

Fx = Fy = [ 1 / (4 pi epsilon0) ] [ q2 / L2 ] [ 1 - sqrt(2) / 4 ]


Problem #3.

|F| = [ 1 /( 4 pi epsilon0 r2 ) ] [alpha Q (1 - alpha) Q] which is maximized when alpha = 1/2.


Problem #4.

Proof: answer given in problem.


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Last revised 1998/02/15