week-10-2

# week-10-2 - Principle of Superposition of Electric Force F1...

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Principle of Superposition of Electric Force 14 13 12 1 F F F F q 1 q 2 q 3 F 13 F 12 F 14 Add by components or Magnitude and direction separately by using trigonometry q 4

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Two positive charges, one 2 C and the other 7 C, are separated by a distance of 20 cm. What is the magnitude of the electrostatic force that each charge exerts upon the other? a) 0.32 N b) 0.63 N c) 0.70 N d) 2.02 N e) 3.15 N q 1 2 C q 2 7 C r 20 cm 0.2 m F kq 1 q 2 r 2 9 10 9 N m 2 /C 2 2 10 6 C 7 10 6 C 0.2 m 2 0.126 N m 2 0.04 m 2 3.15 N
Three positive charges are located along a line as shown. What is the magnitude of the force exerted on the 0.02-C charge by the 0.10-C charge? a) 2.25 x 10 6 N b) 4.5 x 10 6 N c) 9.0 x 10 6 N d) 1.8 x 10 7 N e) 2.7 x 10 8 N q 1 0.02 C q 2 0.10 C r 2 m F kq 1 q 2 r 2 9 10 9 N m 2 /C 2 0.02 C 0.10 C 2 m 2 4.5 10 6 N (to the right)

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Three positive charges are located along a line as shown. What is the net force exerted on the 0.02-C charge by
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## This note was uploaded on 04/23/2011 for the course PHYS 214 taught by Professor Staff during the Spring '08 term at Purdue.

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week-10-2 - Principle of Superposition of Electric Force F1...

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