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29_Ch 21 College Physics ProblemCH21 Alternating Current Circuits and Electromagnetic Waves

29_Ch 21 College Physics ProblemCH21 Alternating Current Circuits and Electromagnetic Waves

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Alternating Current Circuits and Electromagnetic Waves 229 21.62 (a) The required frequency is 8 10 2 3.00 10 m s 1.0 10 Hz 3.00 10 m c f λ × = = = × × . Therefore, the resonance frequency of the circuit is 10 0 1 1.0 10 Hz 2 f LC π = = × , giving ( ) ( ) ( ) 13 12 6.3 10 F 400 10 H = × × × 2 2 10 0 1 1 0.63 pF 2 2 10 Hz C f L π π = = = (b) 2 0 0 A d d A C = = , so ( )( ) 13 3 3 12 2 0 6.3 10 F 1.0 10 m 8.5 10 m 8.5 mm 8.85 10 C N m C d × × = = = × = × A (c) ( ) ( )( ) 10 12 0 2 2 1.0 10 Hz 400 10 H 25 C L f L π π = = = × × = X X 21.63 (a) max max E c B = , so 6 16 max max 8 0.20 10 V m 6.7 10 T 3.00 10 m s E B c × = = = × × (b) ( )( ) ( ) max max 0 6 16 17 2 7 2 0.20
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