4) Three charges of magnitude 3.0 Three charges of magnitude 3.0 times 10-4 C ea

Question

4) Three charges of magnitude 3.0

Three charges of magnitude 3.0 times 10-4 C each are located at x = 1.0 m, y = 0.0 m, at x = 0.0 m, y = 0.0 m, and at x = -1.0 m, y = 0.0 m. The one in the middle is negative, while the other two are positive. What is the net Coulombic force exerted by them on a negative 3.0 times 10-5 C charge located at x = 0.0 m, y = 2.0 m? (The value of k is 9.0 times 109 N·m2/C2.) 87 N repulsive B) 120 N repulsive C) 120 N attractive D) 87 N attractive In the figure Q = 5.8 nC and all other quantities are exact. What is the magnitude of the force on the charge Q?

Explanation / Answer

4. D

5. C

6. D

11. D

14. A

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