Sp05-MT2-Liphardt-Exam

# Sp05-MT2-Liphardt-Exam - UNIVERSITY OF CALIFORNIA, BERKELEY...

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UNIVERSITY OF CALIFORNIA, BERKELEY Physics Department 7b, Liphardt Spring Term 2005 Exam #2 Name __________________________ Disc. Section ____________________ SID ____________________________ #1______ (14) #2______ (12) #3______ (21) #4______ (25) #5______ (20) Total______ The relative weight of each problem is indicated next to the problem number. Most credit will be given for algebraic work. Please do not insert numerical values until you have a final algebraic answer inside a box. If you don’t know a particular constant, use a symbol to get partial credit. It is almost impossible to award partial credit if you insert numbers too early. If you get stuck on one problem, go on to the next and come back to the difficulties later in the exam period. Do not leave early until you have completed everything. Do not quit! Never, never, never quit!! As usual, before you start to manipulate equations and numbers you should think for a moment and make sure that you have a general sense of the important features of a problem. Also, once you have computed something, check to see if your answer has the right units, and if it is in the right ballpark. For example, if your answer to any problem is something like ± x 10 418 Kelvin/meters, you should check your work.

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Problem 1 (14 points). The circuit below consists of a battery (with negligible internal resistance), three light bulbs (A, B, C) each with exactly the same resistance, and three switches (1, 2, 3). Assume that the resistance of a light bulb does not depend on the current that flows through it. In each situation as described below, we want to know which light bulbs are glowing
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## Sp05-MT2-Liphardt-Exam - UNIVERSITY OF CALIFORNIA, BERKELEY...

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