753_Physics ProblemsTechnical Physics

753_Physics ProblemsTechnical Physics - Chapter 26 (c) e j...

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Chapter 26 93 (c) U =− ⋅ =− − + × × pE i j i j 9 10 8 40 10 7 80 4 90 10 12 3 . ± . ± . ± . ± ej e j Cm NC U =+× = 71 0 41 2 10 112 9 .. a f J n J (d) p =+ × = × −− 9 10 8 40 10 12 4 10 22 12 12 . af E × = × == = −= 7 80 4 90 10 9 21 10 114 114 228 33 . max min max min nJ, nJ nJ UU P26.51 (a) Let x represent the coordinate of the negative charge. Then xa + 2c o s θ is the coordinate of the positive charge. The force on the negative charge is Fi =− qE x a f ± . The force on the positive charge is i i + + + qE x a qE x q dE dx a cos ±± cos ± θθ a f a f a f . E p F + F - FIG. P26.51(a) The force on the dipole is altogether FF F i i =+= = −+ q dE dx ap dE dx o s ± cos ± . (b) The balloon creates field along the x -axis of kq x e 2 ± i . Thus, dE dx x e = 2 3 . At x = 16 0 . cm, dE dx = −× × 2 8 99 10 2 00 10 0160 878 96 3 e j a f .
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This note was uploaded on 12/14/2011 for the course PHY 203 taught by Professor Staff during the Fall '11 term at Indiana State University .

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