751_Physics ProblemsTechnical Physics

751_Physics ProblemsTechnical Physics - Chapter 26 P26.45...

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Chapter 26 91 P26.45 C A d = κ 0 or 95 0 10 3 70 8 85 10 0 070 0 00250 10 9 12 3 . .. . . ×= × × ej bg A A = 104 . m P26.46 Consider two sheets of aluminum foil, each 40 cm by 100 cm, with one sheet of plastic between them. Suppose the plastic has 3 , E max ~10 7 Vm and thickness 1 mil = 254 c m 1 000 . Then, C A d VE d = ×⋅ × 0 12 5 6 75 2 3 8 85 10 0 4 254 10 10 10 2 54 10 10 ~ . ~ ~. ~ max max CNm m m F Vm m V 22 2 e j e j P26.47 Originally, C A d Q V i = = 0 af . (a) The charge is the same before and after immersion, with value Q AV d i = 0 . Q = × × = −− 885 10 250 10 250 150 10 369 12 4 2 . m V m pC 2 e j a f (b) Finally, C A d Q V f f = = 0 C f = × × = 80 0 8 85 10 25 0 10 118 12 4 2 . . m m pF 2 e j ∆∆ V Qd A AVd Ad V f ii af af = = === κκ 0 0 0 250 312 V 80.0
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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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