678_Physics ProblemsTechnical Physics

678_Physics ProblemsTechnical Physics - 18 Electric Fields...

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18 Electric Fields Since this is less than 10 mm, the particle does not strike the top plate, but moves in a symmetric parabola and strikes the bottom plate after a time given by yy v t a t fiy i y =+ + 1 2 2 00 6 0 21 0 1 2 11 0 41 3 2 =+ × + −× . m s m s 2 ej e j tt since t > 0, t 120 10 8 s . The particle’s range is xx v t fix =+ =+ × × = × −− 0 7 99 10 1 20 10 9 61 10 48 4 .. . ms s m e j . In sum, The particle strikes the negative plate after moving in a parabola with a height of 0.181 mm and a width of 0.961 mm. P23.49 v i 955 10 3 m s (a) a eE m y == × × 160 10 720 167 10 690 10 19 27 10 . . . af ±ms 2 R v a i y × 2 3 2 127 10 sin . θ m so that 2 3 2 10 3 .s i n . . × × sin . 20 9 6 1 = 36 9 . 90 0 53 1 °− = ° ^ FIG. P23.49 (b) t R v R v ix i cos If 36 9 ., t = 167 ns . If 53 1 t = 221 ns . Additional Problems *P23.50 The two given charges exert equal-size forces of attraction on each other. If a third charge, positive or negative, were placed between them they could not be in equilibrium. If the third charge were at a point x > 15 cm , it would exert a stronger force on the 45
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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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