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P1. (60 pts) Three point charges are placed in the corners of a right triangle of side a - 2 m, which is rotated 90 deg, as shown in the figure below, where g is 1μC. In the point P, we place another charge qo of 1 μC. (a) (10 pts) Find the net electric field E vector (direction and magnitude) in P. (b) (10 pts) Find the electric force in P. (c) (10 pts) With V 0 at infinity, what is the net electric potential in P? (d) (10 pts) What is the electric potential energy in P? (e) (10 pts) What is the energy of the system of FOUR charges? Is this system of charges stable or unstable? infinity into p, if V = 0 at infinity? (1) (10 pts) What is the work done by the electric field to bring the charge q from -2q 2 12 : P +29 P +q : a +2q .
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