Sp2010-Mid2 - Colorado State University - Department of...

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Colorado State University - Department of Physics PH142 -Spring 2010 MIDTERM 2 Tuesday March 23, 2010, 5:00 p.m. - 6:50 p.m. Name ___________________________________ (Please print clearly) VERSION: CSU Student ID #__________________________ Instructions: o When directed to do so, you must fll in your version letter For this test in the box on the bubble sheet, but wait to open your exam. o There are 18 questions, but you need only 15 correct answers For a 100% score. Attempt all problems. There is no penalty For wrong answers. o Allowed with you to take the exam: calculator; two sheets of paper with your notes, and as many blank sheets of paper as you want. o Not allowed: cell phones, PDA's, laptops, headphones, MP3 players, iPods or similar devices, and wireless devices of any kind. o Leave backpacks at front (or back) of the room. Please read each problem carefully before starting to work. DO NOT OPEN THIS EXAM UNTIL DIRECTED TO DO SO. Good luck! MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1
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Figure 23.1a 1) Point charges, Q 1 = + 52 nC and Q 2 = - 91 nC, are placed as shown. In Fig. 23.1a, an external force transports an electron from point A to point B . The work done by the external force is closest to: A) - 570 eV B) + 860 eV C) - 860 eV D) + 570 eV E) + 720 eV 1) 2) A proton with a speed of 3.0 × 10 5 m/s falls through a potential difference V and thereby increases its speed to 9.0 10 5 m/s. Through what potential difference did the proton fall? A) 470 V B) 4200 V C) 240 V D) 4700 V E) 3800 V 2) 2
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Figure 23.4 Two large conducting parallel plates A and B are separated by 2.4 m. A uniform ±eld of 1500 V/m, in the positive x
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This note was uploaded on 12/08/2010 for the course PHYSC 1220 taught by Professor Feiguin during the Fall '10 term at Univeristy of Wyoming- Laramie.

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Sp2010-Mid2 - Colorado State University - Department of...

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