Exam 1 Practice Problems - NAME ID NUMBER Physics 2140...

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NAME ID NUMBER Physics 2140 Winter 2015 Exam 1 INSTRUCTIONS Write your name and ID number on this exam. Write your name and ID number on the Physics 2140 Formulas sheet. On the Scantron, write your name and ID number in the designated boxes and fill in the corresponding bubbles. For each question, fill in the answer bubble on the Scantron and circle your answer on this exam. All Scantron bubbles must be filled in before the exam time ends and not after. Use any empty space (including the extra work space following the Physics 2140 Formulas pages) to show your work. At the end of the exam, turn in this exam, the Physics 2140 Formulas sheet (with extra work space attached), and your Scantron. Only a scientific calculator is allowed. Graphing/programmable calculators are not allowed. All other electronic devices, including smartphones, are not allowed at any time and must be completely silenced or powered off. No notes or books or any other materials may be used during the exam. All of your belongings other than the exam, calculator, pencils, and ID (WSU OneCard or driver’s license) must be placed on the floor under your seat. Exam begins at 6 pm. Exam ends at 7:20 pm. I understand and will follow the above instructions. I will neither give nor receive unauthorized aid in completing this exam. SIGNATURE
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1.What is the correct ranking of the magnitudes of the net electric force on the +𝑞charge in the following three cases? Case 1 Case 2 Case 3 a.1 = 2 = 3b.2> 1> 3c.2 > 1 = 3d.1 = 2 > 3e.3 = 1 > 2 2. A +3 𝜇𝐶 charge and −6 𝜇𝐶 charge are separated by a distance of 6 𝑐? . What is the electric potential at point P between the two charges, 2 𝑐? from the +3 𝜇𝐶 charge? a. +2.70 × 10 6 ? b. −2.70 × 10 6 ? c. −1.35 × 10 6 ? d. +1.35 × 10 6 ? e. None of the above +𝑞 +3? 𝑠 +𝑞 𝑠 𝑠 +?
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