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# rev2sm10 - TA Tomoyuki Nakayama Thursday PHY 2048 Physics 2...

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TA: Tomoyuki Nakayama Thursday, May 27, 2010 PHY 2048: Physics 2 with Calculus, Summer C 2010 Review (Chapter 23.1- 25.7) The purpose of this review is to refresh your memory. Physics is a cumulative subject, so make it sure that you understand basic concepts and typical problem solving techniques in previous chapters before moving on to a new chapter. ________________________________________________________________________________ A. Gauss’s Law A solid nonconducting sphere of radius R = 5.00 cm has a nonuniform charge distribution of volume charge density ρ = (20.0 pC/m 3 )r/R, where r is radial distance from the sphere’s center. Find the electric field ar r = 0, r = R /2 and r = R . Sketch a graph of E versus r . B. Electric Potential Refer to the previous example. Take the electric potential at the sphere’s center to be V 0 = 0. What is V at radial distance r = R /2, r = R and r = . Sketch a graph of V versus r. C. Combination of Capacitors Figure on the right desplays a 20-V battery and 3 uncharged capacitors of capacitances C 1 = 2 μ F, C 2 = 3 μ F and C 3 = 6 μ F. The switch is thrown to the left side until capacitor 1 is fully charged. Then the

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rev2sm10 - TA Tomoyuki Nakayama Thursday PHY 2048 Physics 2...

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