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PHY108_S09_Exam1_Solutions

PHY108_S09_Exam1_Solutions - P1 Two identical conducting...

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P1. Two identical conducting charged spheres are fixed along the x axis. Q 1 = 2.50 nC is placed at x = -7.50 cm and Q 2 = -5.60 nC is placed at x = 7.50 cm. A) (3) What is the force on Q 12 F uur 1 due to Q 2 , in vector form? B) (4) A third identical conducting sphere with initial charge Q 3 = 0.00 is brought into contact with Q 1 and then with Q 2 . What are the new net charges Q 1 , Q 2 ’ and Q 3 ’? C) (6) At what position in ( x , y ) coordinates can you place Q 3 ’ so there is no net force on Q 3 ’? Infinity is not an option. D) (6) You now place Q 3 ’ at ( x , y ) = (0.00, 7.50 cm). What is the force on Q 31 F uur 3 ’ due to Q 1 ’, in vector form? E) (6) What is the force on Q 32 F uuur 3 ’ due to Q 2 ’, in vector form, for configuration in part 1
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P2. In the figure below, particle 1 of charge q 1 = 5.00 μ C is placed at the origin, ( x , y ) = (0.00, 0.00), and particle 2 of charge q 2 = +2.00 μ C at a distance L = 1.00 m along x -axes. A)
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PHY108_S09_Exam1_Solutions - P1 Two identical conducting...

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