exam 11 (152).pdf - Question Three charges are placed as shown in Fig P21.95 The magnitude of q1 is 2.00 \u00c2\u00b5C but its sign and the value of the charge

# exam 11 (152).pdf - Question Three charges are placed as...

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Question: Three charges are placed as shown in Fig. P21.95 . The magnitude of q 1 is 2.00 ÂµC, but its sign and the value of the charge q 2 are not known. Charge q 3 is +4.00 ÂµC, and the net force on q 3 is entirely in the negative x-direction. (a) Considering the different possible signs of q 1 , there are four possible force diagrams representing the forces that q 1 and q 2 exert on q 3 . Sketch these four possible force configurations. (b) Using the sketches from part (a) and the direction of deduce the signs of the charges q 1 and q 2 . (c) Calculate the magnitude of q 2 . (d) Determine F, the magnitude of the net force on q 3 . Answer : The electrostatic force between two charges and separated by a distance r is given by following expression. Here, is the unit vector along the direction of electric force, and k is the Coulombâ€™s constant. The electrostatic force between like charges is repulsive and between unlike charges is attractive.  #### You've reached the end of your free preview.

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• Spring '17
• John DOe
• Electric charge
• • •  