PHYS 1051 Midterm: PHYS 1051 Fall 2012 Term Test 2
Document Summary
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: the gure below shows two charges, 2q and q along a horizontal axis. Indicate with a dot(s) the position (or positions) where electric potential is zero. [2. 5 points: the electric potential in certain region in space is v = (150x2 200y2) v, determine the vector of electric eld at point a(x,y)=(2. 0 m, 2. 0 m). [3 points: determine potential di erence between points a the origin (o(x,y)=(0 m, 0 m).
