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Unformatted text preview: and B is 5.0 mm. 2) A charged conducting sphere of radius 4.0 cm is charged -3.5C as shown. a) What is the electric potential at point A which is 1.5 cm from the center of the sphere? b) What is the electric potential at point B which is 8.0 cm from the surface of the sphere? c) A small charge of mass 2.6 x 10-3 kg is brought from infinity to point B. If the charge of the small sphere is +1.2C, how much work is done by the field? d) If the charge is released from rest at point B, how fast is it moving when it reaches the surface of the larger sphere (assume the larger sphere does not move) 3) Three point charges are placed as shown in the diagram below. The charges are as follows: 1= +2C, 2= -3C, 3= 4.3C a) Find the net electric field at point A. b) Find the net electric potential at point A. c) If another charge of -3.5C is brought to point A, what is the net electric force acting on the new charge. Answers:...
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