12) Charged particles 1 through 3 (with the amount of charges shown in 2 the rig

Question

12) Charged particles 1 through 3 (with the amount of charges shown in 2 the right figure, where elementary charge e = 1.6 × 10-19 C) are placed at the three corners of a square with an edge length of -3e =/acm. (Remember to CONVERTUNITSID a) Find out the electric potential Vat point P, the center of the square 3 b) Find out the magnitude of the electric field E at point P due to charged particles 1 through 3. (6') c) Find out the direction of E at point P. (extra 3') d) Find out the total electric potential energy between the charges. (extra 5')

Explanation / Answer

13. C = e0 er A / d

C = (8.854 x 10^-12 ) (5) (pi 0.01^2) / (0.2 x 10^-3)

C = 69.5 x 10^-12 F

(A) Q = C V = 8.34 x 10^-10 C

(B) U = C V^2 / 2 = 5 x 10^-9 J

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