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8BMidterm1_1_Spring04

# 8BMidterm1_1_Spring04 - University of California at...

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University of California at Berkeley Department of Physics Physics 8B, Spring 2004, Section 1 Midterm 1 March 3, 2004 You will be given 110 minutes to work this exam. No books are allowed, but you may use a handwritten formulae sheet no larger than one side of an 8 1/2 by 11 sheet of paper. Your description of the physics involved in a problem is worth significantly more than any numerical answer. Show all work, and take particular care to explain what you are doing. Please use the symbols described in the problems, tell us why you’re writing any new equations, and label any drawings that you make. Write your answers directly on the exam, and if you have to use the back of a sheet make sure to put a note on the front. Do not use a blue book or scratch paper. NAME: SID NUMBER: DISCUSSION SECTION NUMBER: DISCUSSION SECTION DATE/TIME: ________________ 1 2 3 4 5 Total

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Formulae: (You may not need all of these!) r F = 1 4 πε 0 q 1 q 2 r 2 ˆ r r E = 1 4 πε 0 q 1 r 2 ˆ r r τ = r p × r E p = qd ε 0 Φ = ε 0 r E d r A = q enc E = λ 2 πε 0 r Δ V = Δ U q = r E d r s i f r F = q r E + q r v × r B V = V i i = 1 n = 1 4 πε 0 q i r i i = 1 n r A × r B = AB sin θ q = CV C = ε 0 A d C = 2 πε 0 L ln b a ( ) C = 4 πε 0 ab b a U = 1 2 CV 2 = 1 2 Q 2 C i = dq dt i = V
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