PHY108_EXAM_2_FALL_2003

PHY108_EXAM_2_FALL_2003 - MIDTERM II Physics 108 Fall 2003...

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Page 1 MIDTERM II Physics 108 Fall 2003 Saturday, October 11, 2003 10: a.m. - noon Print your FIRST name:_______________________________________ Print your LAST name: _______________________________________ Sign your name:_____________________________________________ Person number:______________________________________________ Circle your lecture Instructor Cerne T,Th 12:20-1:45 pm Petrou M,W,F 2:00-2:50 pm Instructions This is a closed book exam There are four problems Allow approximately 30 minutes per problem. . You must show ALL work to receive full credit. Numerical answers must have the right units, and if vectors proper directions Use the back of the problem page if you need more space and mark OVER on the front of the page so that your work will be counted. Place your answers in the answer boxes at the bottom of each problem page. Useful Constants ε o = 8.85 × 10 -12 C 2 /N.m 2 k = 8.99 × 10 9 kg.m 3 .s -2 .C -2 e = 1.6 × 10 -19 C m p = 1.67 × 10 -27 kg m n = 1.67 × 10 -27 kg m e = 9.11 × 10 -31 kg N A = 6.02 × 10 23 atoms/mol Please do not write below this line PROBLEM NUMBER MAXIMUM SCORE YOUR SCORE GRADER 1 25 2 25 3 25 4 25 TOTAL 100
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Page 2 Problem 1 Print Your Name: _________________________________ Charges q 1 = -1.1 & 10 -6 C, q 2 = 3.3 & 10 -6 ,C and q 3 = 2.2 & 10 -6 C are placed at points F(0, 2.2m), the origin O and point G (0, -4.5m), respectively. (a) (6) Find the electric potential V A at point A(2,0) m (b) (6) Find the electric potential V B at point B(5,0) m (c) (6) A charge q = 7 × 10 -6 C is moved from point A to point B along path 1. Calculate the work W that an external agent must do in the process (d) (3) Did the external agent in part (c) have to do work or not? Explain (e) (4) The charge q = 7 × 10 -6 C is moved from point A to point B along path 2 through point C (5m,-3.1m) Calculate the work W’ that an external agent must do in the process 22 3 12 1 123 23 6 4 12 ’22 3 1 ’’’
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This test prep was uploaded on 04/14/2008 for the course PHYSICS 108 taught by Professor Halstead during the Spring '08 term at SUNY Buffalo.

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PHY108_EXAM_2_FALL_2003 - MIDTERM II Physics 108 Fall 2003...

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