943_Physics ProblemsTechnical Physics

943_Physics ProblemsTechnical Physics - 284 P33.62...

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284 Alternating Current Circuits P33.62 (a) With both switches closed, the current goes only through generator and resistor. it V R t a f = max cos ω (b) P = 1 2 2 V R max bg (c) V RL t L R a f = + + F H G I K J L N M O Q P max cos arctan 22 2 FIG. P33.62 (d) For 0 1 00 == F H G I K J φ ωω arctan LC R . We require 0 0 1 L C = , so C L = 1 0 2 . (e) At this resonance frequency, ZR = . (f) UC V C I X CC 1 2 1 2 2 I X C V RC VL R C max max max max = 1 2 1 2 1 2 2 2 0 2 2 ∆∆ (g) UL I L V R max max max 1 2 1 2 2 2 2 (h) Now 2 2 0 LC . So = F H G I K J = F H G I K J = F H G I K J arctan arctan arctan R RR L C 12 1 2 3 2 b g . (i) Now L C = 1 2 1 1 0 LC . P33.63 (a) I V R R , . rms rms V 80.0 A = 100 125 (b) The total current will lag the applied voltage as seen in the phasor
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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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