P213_Prelim_Exam_2_S08_v3 - Your Name Recitation...

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Your Name Recitation Instructor's Name: Recitation Section #: Physics 213 April 3, 2008 Prelim Exam #2 7:30 - 9 PM PLEASE BE SURE THIS PACKET HAS 11 PAGES ! ( This includes the cover sheet.) This packet contains 7 Short Answer Questions , 4 Problems , and a page of Possibly Useful Information . You may use any relevant information from that page without derivation. Write your answers ON THESE QUESTION SHEETS in the spaces provided. For Short Answer Questions #1-7, ONLY ANSWERS WILL BE GRADED, unless calculations or constructions are explicitly requested. For Problems #8-11, where algebra or computations are required, BE SURE YOUR METHOD OF SOLUTION IS CLEAR, and SHOW ALL YOUR WORK in the spaces provided. If you need more space, use the backs of the question sheets and indicate the whereabouts of your work for each question. ANSWERS WITHOUT WORK will NOT receive credit (except for short answer questions). WORK ON SCRATCH PAPER WILL NOT BE GRADED. Point values for questions are given by each problem and below. BUDGET YOUR TIME. Don't spend too much time on any one question or part of a question. Answer those questions you can do easily first, and then return to the more difficult ones. It is valuable use of your time to READ THE ENTIRE EXAM before starting to work on it. This is a CLOSED BOOK and CLOSED NOTES exam. You may NOT use any other references or personal assistance. GRAPHING CALCULATORS are NOT allowed. You MAY use a NON-GRAPHING calculator. For Grading Only: 1-4 /14 8 /15 5-6 /11 9 /12 7 /15 10 /15 11 /18 TOTAL /100
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2 I. SHORT ANSWER [40 points] Write your answers in the spaces provided. 1. [3 points] When the plates of the charged parallel plate capacitor are moved farther apart, the magnitude of the reading on the ideal voltmeter: (A) increases (B) decreases (C) doesn't change answer: 2. [3 points] An electric current flows through resistor R: (A) when switch S is kept open. (B) when switch S is being closed. (C) when switch S is kept closed. (D) when switch S is being opened. (E) never. Give all that apply: 3. [2 points] Electrically charged particles from outer space are prevented from striking most places on the Earth except near its poles because these particles are attracted to the Earth's magnetic poles. (T) True answer (F) False 4. [6 points] The same uniform magnetic field exists throughout regions #1 and #2. A uniform electric field exists only in region #1. A positively (+) charged particle moves along the path shown in a plane parallel to this page through regions #1 and #2.
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P213_Prelim_Exam_2_S08_v3 - Your Name Recitation...

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