PHY2054 - Fall 2006 Exam 2

PHY2054 - Fall 2006 Exam 2 - 77777 PHY 2054 Name (print,...

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77777 77777 PHYSICS DEPARTMENT PHY 2054 2nd Exam Fall, 2006 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. (1) Code your test number on your answer sheet (use lines 76–80 on the answer sheet for the 5-digit number) . Code your name on your answer sheet. DARKEN CIRCLES COMPLETELY . Code your UFID number on your answer sheet. (2) Print your name on this sheet and sign it also. (3) Do all scratch work anywhere on this exam that you like. Circle your answers on the test form. At the end of the test, this exam printout is to be turned in. No credit will be given without both answer sheet and printout. (4) Blacken the circle of your intended answer completely, using a #2 pencil or blue or black ink . Do not make any stray marks or some answers may be counted as incorrect. (5) The answers are rounded off. Choose the closest to exact. There is no penalty for guessing. If you believe that no listed answer is correct, leave the form blank . (6) Hand in the answer sheet separately. Constants g = 9 . 80 m/s 2 e = 1 . 6 × 10 - 19 C 1 μ C = 10 - 6 C G = 6 . 67 × 10 - 11 Nm 2 /kg 2 m e = 9 . 11 × 10 - 31 kg sin45 = 1 / 2 k E = 8 . 99 × 10 9 Nm 2 /C 2 m p = m n = 1 . 67 × 10 - 27 kg μ 0 = 4 π × 10 - 7 Tm/A ² 0 = 8 . 85 × 10 - 12 C 2 /N/m 2 1 eV = 1 . 6 × 10 - 19 J c = 3 × 10 8 m/s 1. The current circuit of voltage supplies, resistors, and capacitors is in steady state. The resistors have the following values: R 1 = 15Ω, R 2 = 25Ω, R 3 = 14Ω, R 4 = 26Ω. The capacitor has a capacitance of C 1 = 5 μF and the batteries have the following voltages: U 1 = 10 V , U 2 = 20 V , U 3 = 35 V . Calculate the magnitude of the voltage (in V) across C 1. R1 R2 R3 R4 C1 U3 U1 U2 (1) 18.8 (2) 19.5 (3) 17.8 (4) 18.3 (5) 21.3 2. The circuit shown has the following components: U 1 = 6V, R 1 = 10Ω, R 2 = 15Ω, R 3 = 100Ω, R 4 = 25Ω, and C 1 = 1mF = 10 - 3 F. Assume the switch is closed and the capacitor is fully charged.
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This note was uploaded on 03/15/2010 for the course PHY 2054 taught by Professor Avery during the Spring '08 term at University of Florida.

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PHY2054 - Fall 2006 Exam 2 - 77777 PHY 2054 Name (print,...

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