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practice_test_I

# practice_test_I - Physics 313 Practice Test Page 1...

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Physics 313 Practice Test Page 1 University Physics III Practice Test I This practice test should give you a rough idea of the format and overall level of the Physics 313 exams. The actual exams will have different questions and problems, and may cover a different selection of topics. Individual questions and problems on the actual exams may be either harder or easier than those in this practice exam. Formulas and constants: r F = q r E r E = 1 4 "# 0 Q r 2 ˆ r r E d r A = q enc " 0 # k = 1 4 "# 0 = 8.99 \$ 10 9 Nm 2 C 2 m electron = 9.11 " 10 # 31 kg e = q electron = 1.60 " 10 # 19 C

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Physics 313 Practice Test Page 2 1. (a) When two charges are held a distance d apart, they experience a repulsive force of 24.0 N. If these charges are held 4 times farther apart, what force do they experience? (b) Two charges are placed on the x axis as shown. Where along the x axis could the net electric field be zero? (A) only for x < 0 (B) for 0 < x < 3m (C) only for x > 3m (D) for x < 0 and x > 3m (E) no where along the x axis (c) What are the units of electric flux?
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practice_test_I - Physics 313 Practice Test Page 1...

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