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Unformatted text preview: 77777 77777 Instructor: Prof. P. Kumar PHYSICS DEPARTMENT PHY 2049 Final Exam, Summer 2010 August 5, 2010 Name (print, last first): Signature: On my honor, I have neither given nor received unauthorized aid on this examination. YOUR TEST NUMBER IS THE 5-DIGIT NUMBER AT THE TOP OF EACH PAGE. DIRECTIONS (1) Code your test number on your answer sheet (use 7680 for the 5-digit number) . Code your name on your answer sheet. Darken circles completely (errors can occur if too light) . Code your student number on your answer sheet. (2) Blacken the circle of your intended answer completely, using a number 2 pencil . Do not make any stray marks or the answer sheet may not read properly. (3) The answers are rounded off. Choose the closest to exact. There is no penalty for guessing. Table of constants k = 1 4 = 9 10 9 e = 1 . 6 10- 19 C m e = 9 . 11 10- 31 kg c = 3 10 8 m/s 1. A 140 pF capacitor is charged to a potential difference of 60 V, and the charging battery is disconnected. The capacitor is then connected in parallel with a second (initially uncharged) capacitor. If the potential difference across the first capacitor drops to 56 V, what is the capacitance of this second capacitor?capacitor drops to 56 V, what is the capacitance of this second capacitor?...
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- Summer '08