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QuizWk4Soln - Name Section Physics 208 Spring 08 Week 4...

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Name ____________________________________ Section ___________ Physics 208, Spring 08, Week 4 Quiz Feb. 14, 2008 1. Two uniformly-charge spheres are firmly fastened to, and electrically insulated from, frictionless pucks on an air table. The charge on sphere 2 is three times the charge on sphere 1. Which choice below correctly shows the magnitude and direction of the forces? 3. A material that permits electric charge to move through it is called a(n) a. insulator b. conductor c. inductor d. perceptor 3. Below are three particles, two +1 µ C and one -1 µ C, all 1 mm from the origin. Mark with an X a location that a particle with adjustable positive charge could be placed so that the electric field at the origin could be made zero. The electric field at the origin due to the two positive charges is zero. The electric field at the origin due to the negative charge is directed upwards. So any position along the positive y-axis would let a positive charge cancel this electric field. x
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QuizWk4Soln - Name Section Physics 208 Spring 08 Week 4...

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