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phy2049e1sm09 - 77777 Instructor P Kumar PHY 2049...

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77777 77777 Instructor: P. Kumar PHYSICS DEPARTMENT PHY 2049 Exam I June 1, 2009 Name (print, last first): Signature: On my honor, I have neither given nor received unauthorized aid on this examination. YOUR TEST NUMBER IS THE 5-DIGIT NUMBER AT THE TOP OF EACH PAGE. DIRECTIONS (1) Code your test number on your green answer sheet (use 76–80 for the 5-digit number) . Code your name on your answer sheet. Darken circles completely (errors can occur if too light) . Code your student number on your answer sheet. (2) Blacken the circle of your intended answer completely, using a number 2 pencil . Do not make any stray marks or the answer sheet may not read properly. (3) The answers are rounded off. Choose the closest to exact. There is no penalty for guessing. >>>>>>>> WHEN YOU FINISH <<<<<<<< Hand in the green answer sheet separately. 1. The total negative charge on the electrons in 1 mol of helium (atomic number 2, molar mass 4 g/mole) is: (1) 1 . 9 × 10 5 C (2) 4 . 8 × 10 4 C (3) 9 . 6 × 10 4 C (4) 3 . 8 × 10 5 C (5) 7 . 7 × 10 5 C 2. Two identical conducting spheres A and B carry equal charge. They are separated by a distance much larger than their diameters. A third identical conducting sphere C is uncharged. Sphere C is first touched to A, then to B, and finally
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