ch31-p082 - 82. (a) The reactances are as follows: X L = 2...

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15 1 22 2 2 2 2 (400 Hz)(0.0242 H) 60.82 (2 ) [2 (400 Hz)(1.21 10 F)] 32.88 ( ) (20.0 ) (60.82 32.88 ) 34.36 Ld Cd LC Xf L C ZRX X π ππ −− == = × = =+ = + = With 90.0 V, ε = we have rms 90.0 V 2.62 A 2.62 A 1.85 A 34.36 I II Z = = = = . Therefore, the rms potential difference across the resistor is V R rms = I rms R = 37.0 V. (b) Across the capacitor, the rms potential difference is
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