practiceexam2 - Exam I 13301 Winter 2006 Dr Abramzon Name...

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Exam I 13301 - Winter 2006 / Dr. Abramzon Name Instructions: Closed book – you may use ONE 3”x5” card with formulas only. Read each problem carefully. There are 3 problems, worth a total of 30 points. There is one bonus problem worth an additional 3 points. It is critical that you show all of your work - don't just write down your answers Please turn in your formula sheet at the end of the exam Good luck! Question 1 (10 points)___________ Question 2 (10 points) ___________ Question 3 (10 points) ___________ Bonus Question (2 points) ___________ Total:
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Question 1 (10 points) a) (5 points) The figure below shows two points (1 and 2) near a set of charged particles. All particles carry charges of equal magnitude. In each case, is the magnitude of the electric field at point 1, larger than , equal to , or smaller than that at point 2? Explain b) ( 5 points) The figure below shows the forces that three charged objects exert on each other. Which of the four situations shown is/are not correct. Explain your reasoning. (The size of the circle roughly corresponds to the amount of charge)
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