# Practice Quiz 4 - Practice Quiz 4 1 Four point charges of...

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Practice Quiz 4 1) Four point charges of equal magnitude and signs are arranged on three of the corners and at the center of the square of side d as shown in Figure above. Which of the arrows shown represents the net force acting on the center charge? A) A B) B C) C D) D Answer: B 2) Three equal point charges of varying signs are placed on three of the corners of a square of side d as shown in Figure above. Which of the arrows shown represents the direction of the net electric field at the vacant corner of the square? A) A B) B C) C D) D Answer: B

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3) Figure above shows four Gaussian surfaces surrounding a distribution of charges. The Gaussian surface (surfaces) that has (have) no electric flux through it (them) is (are) A) a. B) b. C) c. D) b and d. Answer: C 4) Four equal charges are located at the corners of a square of side d . If the length of each side of the square is doubled, then what happens to the resultant force on each charge? A) It is doubled.
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## This note was uploaded on 05/13/2010 for the course PHYSICS 103 taught by Professor K during the Spring '10 term at California State University Los Angeles .

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Practice Quiz 4 - Practice Quiz 4 1 Four point charges of...

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