test_2_winter_2011 - Circle instructor: Morrow or Yethiraj...

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Circle instructor: Morrow or Yethiraj 1 Name:__________________________ Lab period: _____________ Student Number:______________________ MEMORIAL UNIVERSITY OF NEWFOUNDLAND DEPARTMENT OF PHYSICS AND PHYSICAL OCEANOGRAPHY Physics 1051 Winter 2011 Term Test 2 March 11, 2011 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: Morrow or Yethiraj 2 Name:__________________________ Lab period: _____________ Student Number:______________________ [10] 1. (a) A charge of C 10 0 . 8 6 Q is uniformly distributed over a ring of radius cm 5 . 2 a . (i) What is the electric field at the centre of the ring? (ii) What is the electric potential at the centre of the ring? (iii) How much work would you need to do to slowly push an electron into the centre of the ring from a point infinitely far away? (b) For each of the four cases shown below, indicate the initial direction in which the
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test_2_winter_2011 - Circle instructor: Morrow or Yethiraj...

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