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Fa06-MT2-Packard-Exam

# Fa06-MT2-Packard-Exam - Physics 7b Fall 2006 Midterm Exam 2...

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Physics 7b Fall 2006 Midterm Exam 2 R. Packard Work all five problems. The first four are weighted equally and the fifth is worth half as much. Introduce and clearly define algebraic symbols. Do not perform numerical work until you have a final algebraic answer within a box . Check the dimensions of your answer before inserting numbers. Work the easiest problem first, and the next hardest, etc. If you do not understand the question, ask the proctor for assistance. Name_________________________________________________ SID__________________________________________________ Section Number or Day and Time__________________________ GSI name (if known) ____________________________________ 1. _________ 2. _________ 3. _________ 4. _________ 5. _________ Total _________

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1. (20pts) A line charge of length L and lineal positive charge density λ rests along the x axis, as shown above. A point positive charge Q with mass m is released from a point on the x axis a distance d away from one end. Find the speed of the charge when it reaches a distance 2d away from the end.
2. (20pts) As shown above, a sphere of radius R and uniform charge density ρ rests on an infinite plane of surface charge density σ . Let

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Fa06-MT2-Packard-Exam - Physics 7b Fall 2006 Midterm Exam 2...

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