practice_exam1_withkeys

practice_exam1_withkeys - PHYS 272 Fall 2010 Practice Exam...

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1 PHYS 272 Fall 2010 Practice Exam 1 There are two parts to the Exam 1, part 1 is a machine-graded test (multiple choice problems) and part 2 is a separate test that you turn in to be graded by hand. A formula sheet is provided (see end page). Machine Answer Sheet: Using a pencil, fill in Last Name, First Name, & Middle Initial, plus your 10-digit Purdue University ID number. Enter Instructor (Chen/Manfra), Course (PHYS 272), Date (), and Test (1). You must include your Signature. Fill in circle “A” for Test Form. Hand-Graded Sheet : Enter your Name, Signature, PUID, and circle your Recitation Section. When finished with both parts, bring them to the front of the classroom, show your Purdue ID card to the Instructor, and turn in the machine-graded answer sheet and the hand-graded answer sheet at the same time. These two parts together are worth 120 points total. Your grades will appear in the CHIP grade book in a few days. You should keep this copy of the exam in case you have questions for your TA. Part 1: Machine Graded Test There is only one correct answer to each problem. Each problem carries 10 points.
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2 Problem 1 [5 points] The magnitude of the electric field due to a small dipole is measured to be 100 N/C at a location “A” on the axis perpendicular to the dipole 3 cm from its center. Approximately what is the magnitude of the electric field due to the dipole at a location 6 cm from the center of the dipole along an axis parallel to the dipole?
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