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test_2_winter_2009

# test_2_winter_2009 - Circle instructor Poduska or Morrow...

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Circle instructor: Poduska or Morrow 1 Name:__________________________ Lab period: _____________ Student Number:______________________ MEMORIAL UNIVERSITY OF NEWFOUNDLAND DEPARTMENT OF PHYSICS AND PHYSICAL OCEANOGRAPHY Physics 1051 Winter 2009 Term Test 2 March 20, 2009 INSTRUCTIONS: 1. Do all questions. Marks are indicated in the left margin. Budget time accordingly. 2. Write your name and student number on each page. 3. You may use a calculator. All other aids are prohibited. 4. Write answers neatly in space provided. If necessary, continue onto the back of the page. 5. Do not erase or use “whiteout” to correct answers. Draw a line neatly through material to be replaced and continue with correction. 6. Assume all information given is accurate to 3 significant figures. 7. Don’t panic. If something isn’t clear, ASK! SEE LAST PAGE FOR SOME POTENTIALLY USEFUL FORMULAE AND CONSTANTS For office use only: 1 2 3 4 total

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Circle instructor: Poduska or Morrow 2 Name:__________________________ Lab period: _____________ Student Number:______________________ [10] 1. The graph below shows equipotential lines around three point charges; A , B , C , and D . The lines are drawn in steps of 20 V for all voltages between -60 V and +60 V. The electric potential is taken to be 0 at infinity. 0 0 20 -20 -40 40 -60 1234567891 0 1 2 3 4 5 6 7 8 9 10 0 k f g h e D C B A y (cm ) x (cm ) (a) What is the sign of charge A ? Which other charge has the same sign? (b) Carefully draw the electric field line that starts on one charge, passes through point k , and ends on another charge. Be sure that the direction of the field line and the charges on which it starts and ends are clearly shown.
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test_2_winter_2009 - Circle instructor Poduska or Morrow...

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