18_Chapter 21 HomeworkCH21 Alternating Current Circuits and Electromagnetic Waves

18_Chapter 21 HomeworkCH21 Alternating Current Circuits and Electromagnetic Waves

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218 CHAPTER 21 (a) At resonance, 0 -6 13 . 0 0 H 1000 3.00 10 F CL L L L C LC ω  == = = = =  ×  XX Thus, 22 0 ZR =+ = R , rms rms 120 V 4.00 A 30.0 V I Z () and 2 4.00 A 30.0 480 W = 2 av rms IR == P (b) At 0 2 1 = ; ( ) 0 1 500 2 LL , ( ) 0 0 0 CC 0 = =Ω 2 2 2 2 30.0 500 2 000 1 500 LC ZRXX =+− = + Ω − Ω = and rms 120 V 0.080 0 A 1 500 I ( so ) 2 2 av rms 0.080 0 A 30.0 0.192 W = P (c) At 0 1 4 = ; ( ) 0 1 250 4 , ( ) 0 44 0 0 0 = , and 3750 Z = rms 120 V 0.032 0 A 3750 I so ( ) 2 0.032 0 A 30.0 3.07 10 W 30.7 mW
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This document was uploaded on 10/20/2011.

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