9_Ch 21 College Physics ProblemCH21 Alternating Current Circuits and Electromagnetic Waves

9_Ch 21 College Physics ProblemCH21 Alternating Current Circuits and Electromagnetic Waves

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Alternating Current Circuits and Electromagnetic Waves 209 (b) 11 126 719 tan tan 49.9 500 LC XX R −− Ω−    φ == Thus, = ° the current leads the voltage by 49.9 ° 21.19 () 6 66.3 2 2 60.0 Hz 40.0 10 F C X fC π = × ( ) 2 22 2 50.0 0 66.3 ZRXX =+− = + −Ω 83.1 = (a) rms rms 30.0 V 0.361 A 83.1 V Z = I (b) ( ) ,rms rms 0.361 A 50.0 18.1 V R VI R = = ∆= (c) ( ) 0.361 A 66.3 23.9 V CC X = = (d) 06 6 . 3 tan tan 53.0 50.0 R so, = ° the voltage lags behind the current by 53.0° 21.20 ( )( ) 2 2 60.0 Hz 0.100 H 37.7 L Xf L =Ω 6 26 2 2 60.0 Hz 10.0 10 F C X × 5 = 2 2 50.0 37.7 265 + Ω 233 = (a) , rms rms 2.75 A 50.0 138 V R R = = (e) ± ± ² ±²±³´µ±¶ ± ± ³ ±²±³·¸±¶
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