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Unformatted text preview: Illllllil lllr@ lIilllltI rd]L'iJ"s ttIff .e Tutoring problem available (at instructor's discretion) inwileyPLIJS and WebAssign g s M . t  r . a t# ssM What must be the distance between point charge qr: ,0 pC and point charge ez : 47 .0 p.C for the electrostatic force tween them to have a magnitude of 5.70 N? "S# In the return stroke of a typical lightning bolt, a current 2.5 x 101A exists for 20 ps. How much charge is transferred in lhis event? A particle of charge +3.00 x 106 C is 12.0 cm distant from a lecond particle of charge 1.50 x 106 C. Calculate the magni lucle of the electrostatic force between the particles. r$ llw Two equally charged particles are held 3.2 x 103m Irllirrt and then released from rest. The initial acceleration of the lirst particle is observed to be 7.0 m/s2 and that of the second to he t).0 m/sr. If the mass of the first particle is 6.3 x 107 kg, what ture (a) the mass of the second particle and (b) the magnitude of lhe charge of each particle? ,'7 In Fig. 2122, three charged particlcs lie on an x axis. particles I :rnd 2 are fixed in place. Particle 3 is free to move, but the net , L t : # 1  z : 4 Additional information available in The Flying Circus otf Physics and at flyingcircusofphysics.com 214 Coulomb's Law WryYV Workedout solution is at ILW Interactive solution is at electrostatic force on it from parti cles 1 and 2 happens to be zero. If Lzt : L,r. what is the ratio q1lq2? ..8 In Fig. 2I23, three identical conducting spheres initially have the following charges: sphere A, 4Q; sphere B, 6Q; and sphere C, 0. Spheres A and B are fixed in placc, with a centertocenter separation that is much larger than the spheres. 1 . .  S   l i l Two experiments are conducted. In experiment 1, sphere C is touched to sphere A and then (separately) to sphere .8, and then it is removed. In experirnent2, starting with the same initial states, the procedure is reversed: Sphere C is touched to sphere B and then (separately) to sphere A, and then it is removed. What is the ratio of the electrostatic force between A and ^B at the end of experiment 2 to that at the end of experiment 1? ..9 SSM w\,vw Two identical conducting spheres, fixed in place, attract each other with an electrostatic force of 0.108 N when their centertocenter separation is 50.0 cm. The spheres are then connected by a thin conducting wire. When the wire is removed, the spheres repel each other with an electrostatic force of 0.0360 N. Of the initial charges on the spheres, with a positive net charge, what was (a) the negative charge on one of them and (b) the positive charge on the other? ..10 S In Fig. 2I24, four particles form a square. The charges are q1: e q : Q a n d q 2 : e 3 : q . ( a ) W h a t i s Qlq if the net electrostatic force on particles 1 and 4 is zero? (b) Is there any value of q that makes the net elec trostatic force on each of the four parti [  r   ] l Fig 2125 Problems 1 3 . 1 9 , 3 0 . 5 8 ....
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This document was uploaded on 10/25/2010.
 Fall '09
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