PHYS 1051 Midterm: PHYS 1051 Spring 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 q and +4q. Draw a dot (or dots) at position (or positions) where electric eld is zero. [2. 5 points: two point charges, qa = 6. 00 10 6 c and qb = 3. 00 10 6 c, are located at points. A=(0,0) cm and b=(0,4) cm: determine the magnitude of the electrostatic force between these two charges. [2 points: determine the electric eld vector at point c=(4,0) cm.
