Figure 21-31 shows an 2 of charge q1 q2 3.20 1019 C are on a y axis at distance d 17.0

Chapter 21, Problem 22

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Figure 21-31 shows an 2 of charge q1 q2 3.20 1019 C are on a y axis at distance d 17.0 cm from the origin. Particle 3 of charge q3 6.40 1019 C is moved gradually along the x axis from x 0 to x 5.0 m. At what values of x will the magnitude of the electrostatic force on the third particle from the other two particles be (a) minimum and (b) maximum? What are the (c) minimum and (d) maximum magnitudes? Module 21-2 Charge Is Quantized 24 Two tiny, spherical water drops, with identical charges of 1.00 10 16 C, have a center-to-center separation of 1.00 cm. (a) What is the magnitude of the electrostatic force acting between them? (b) How many excess electrons are on each drop, giving it its charge imbalance? 25 ILW How many electrons would have to be removed from a Figure 21-28 17. d (a) (b ) 1 2 d d 3 A B C A B C x x (a) (b) Figure 21-29 18. 27 SSM The magnitude of the electrostatic force between two idenFnet 2 1 0 0 90 180 1 2 (a) (b) (c) x x A C B A C B d d d Figure 21-30 20. arrangement of four charged particles, with angle u 30.0 and distance d 2.00 cm. Particle 2 has charge q2 8.00 10 19 C; particles 3 and 4 have charges q3 q4 1.60 10 19 C. (a) What is distance D between the origin and particle 2 if the net electrostatic force on particle 1 due to the other particles is zero? (b) If particles 3 and 4 were moved closer to the x axis but maintained their symmetry about that axis, would the required value of D be greater than, less than, or the same as in part (a)? 23 In xy1 2 d D34 Figure 21-31 22.