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# quiz1 - 1 = 9.0 x 10-6 C is at x=-1 m and charge q 2 =-2 x...

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9/02/09 P. Kumar PHY 2054/3808 This quiz was not given. It is included here as a practice object, QUIZ I 1. Four point charges, each of the same magnitude, with varying signs as specified, are arranged at the corners of a square as shown. Which of the arrows labeled, A, B C and D, gives the correct direction of the net force which acts on the charge at the upper right corner. The answer is B. The arrows A and C indicate the directions of attractive forces exerted by the positive charges. All charges charges being equal, the repulsive force from the negative charge is weaker. 2. Two point charges are located on the x-axis as follows: Charge q
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Unformatted text preview: 1 = 9.0 x 10-6 C is at x=-1 m and charge q 2 = -2 x 10-6 C is at x = 3m. What is the net force (in N) on a third charge q 3 = +4 x 10-6 C located at x = 5m? The net force F on q 3 is F = F 1 +F 2 where F 1 is the repulsive force from q 1 , directed in the positive x direction and the attractive force F 2 from q 2 in the negative x direction. N q q kq F 3 2 6 2 6 6 9 2 2 2 1 3 10 9 2 10 2 6 10 9 10 4 10 9 2 6----×-= ×-× × × × = -= in the –x direction A +Q +Q-Q B-Q C D...
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