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Physics 6B - Midterm #2

# Physics 6B - Midterm #2 - ,aysics 613 Katsushi Arisaka...

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,aysics 613 Katsushi Arisaka / November 14,2005 Second Midterm (Type B) I Last Name: First Name: Student ID No. @31%" \'z;<h Enrolled Lecture: 2 - loam ' 3 1 lam I ,*-/ --- . -,-= Important Remarks: Sorry to tell you but during the exam, close books, close notes, no calculator is allowed. Please use any open space on the exam for your solution. Please write down how you derived concisely (which helps you to get a partial credit even if the final answer is wrong.) a Feel free to use the given formulae on the next page without r~roof. Please stav seated until the time is over (10:SOarn or 1 1:50am), which helps the rest of the students to concentrate on the exam. * Total is 100 points. Your Points:

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I I i 1 Two paint charges are located as shown below. One has positive charge +Q and located at (x, y) = (0, +a). The other has positive charge +2Q and located at (0, -a). a) What is the force acting an the charge Q by the charge 2 0 ? (Specify the magnitude and direction clearly.) b) FindtheElectricFieId atpoint P=(0, 0). (Specify themagnitude anddirection.)
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Physics 6B - Midterm #2 - ,aysics 613 Katsushi Arisaka...

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