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# S94(1) - Physics 4B SECOND EXAM Chapters 26 28 Spring 1994...

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1 Physics 4B SECOND EXAM Chapters 26 - 28 Spring 1994 Name:_________________________________________ Solve the following problems in the space provided. Use the back of the page if needed. Each problem is worth 20 points. You must show your work in a logical fashion starting with the correctly applied physical principles which are on the last page. Your score will be maximized if your work is easy to follow because partial credit will be awarded. 1. In the circuit at the right V=12.0V, C 1 =4.00μF and C 2 =8.00μF. Initially the capacitors are uncharged. (a)Find the charge on the capacitors when switch S 1 is closed and switch S 2 is open. (b)Now, S 1 is opened and S 2 is closed. The charge that was on C 1 can flow to C 2 . Find the resulting charge on each capacitors. 2. Two identical spheres of radius a are separated by a distance b. The sphere on the right has a charge, +Q, and the sphere on the left has a charge, -Q. Find (a)the electric field at a distance r from the sphere on the right along the line that joins the spheres, (b)the potential difference between the

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S94(1) - Physics 4B SECOND EXAM Chapters 26 28 Spring 1994...

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