PHYS 1051 Midterm: PHYS 1051 Spring 2013 Term Test 2
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Instructions: there are four questions, each worth 12. 5 points in total. Answer all the questions, show all your workings: the amount of points awarded for each part in the bracket next to it, do not erase or whiteout your answers. Draw a line through what you think is wrong and continue your calculations: notes, textbooks, cellphones and electronic devices with exception of a calculator are not permitted, please use three signi cant gures in all calculations, relax. Question i: two oppositely charged metal spheres have equal quantities of charge. They are brought into contact with a neutral metal rod. Use both charge diagrams and words to explain. [2. 5 points: two point charges, qa = +3. 00 10 6 c and qb = 6. 00 10 6 c, are located at points. A=(-4,0) m and b=(-4,6) m: determine the magnitude of the electrostatic force between these two charges. Question ii: the gure below shows two charges q and 3q.
