inclasstest 01-solutions

inclasstest 01-solutions - Version 033/AACAB inclasstest 01...

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Version 033/AACAB – inclasstest 01 – Turner – (56725) 1 This print-out should have 3 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points The diagrams below depict three electric field patterns. Some of these patterns are physi- cally impossible. Assume these electric field patterns are due to static electric charges outside the regions shown. (a) (b) (c) Which electrostatic field patterns are phys- ically possible? 1. (a) and (c) 2. (a) and (b) 3. (a) only 4. (c) only 5. (b) and (c) 6. (b) only correct Explanation: Electrostatic lines of force do not intersect one another. Neither do they form a closed circuit (unless there is a changing magnetic field present). 002 (part 1 of 2) 10.0 points Three charges are arranged as shown in the figure. x y 2 . 7 nC 4 m 0 . 9 nC 0 . 62 nC 1 . 7 m Find the magnitude of the electro- static force on the charge at the origin. The Coulomb cosnstant is 8 . 98755 × 10 9 N · m 2 / C 2 .
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