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Unit 13 Solutions_Page_10

Unit 13 Solutions_Page_10 - (C 2010 McGraw—Hill Problems...

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Unformatted text preview: (C) 2010 McGraw—Hill Problems: 21.15, 21.17, [21.18], [21.20], 21.21, [21.25], 21.28, 21.30 15. Strategy The reactance is X0 =1/(QJC) where Ce) 2 Qflf. Solution (a) Solveforf 1 1 1 X = ,so = =—= 60.0Hz. C 23ft? f 27:ch 27r(6.63><103 Q)(0.400><10—6 F) (b) Compute the reactance. 1 1 X =—=—= 13.3kQ C wC 2::(300 Hz)(0.400><10'fi F) 17. Strategy Vms = ImSXC where X0 =1/(QJC). Solution Solve for the capacitance, C. C I I 2.3 10-3 A I I Vrms :IrrnsXC 2&3 so C:$:X—: -_ QJC ZflfVm 2%(600 HZ)(115 V) Km 18. Strategy Replace each quantity in X0 : 1/(60C) with its SI units. Solution Show that the units of capacitive reactance are ohms. , 1 V V misins1andC‘isin1::—,szC isin _1 C:?:_:Q_ V s -7 — A S 20. (a) Strategy A: = 174 =1/(4f) and AQ = Q 2 CV. Solution Find iav. _ ,AQ, 1 7 7 260017 Lav 7 37 [EJAQ 7 (4f)(CV) (b) Strategy Vms : IMSXC :V/JE. UseEq. (21-7). Solution Find Inns. ; _ Vms _% _ 0001/ THIS X0 % J; 780 ...
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