ch31-p040 - 40. (a) The circuit has a resistor and a...

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method 1 : At ω d = 50 rad/s, we have Z 700 which gives C = ( ω d Z 2 - R 2 ) 1 = 41 µ F. method 2 : At ω d = 50 rad/s, we have X C 500 which gives C = ( ω d X C ) 1 = 40 µ F. method 3 : At ω d = 250 rad/s, we have X C 100 which gives C = ( ω d X C ) 1 = 40 µ F. 40. (a) The circuit has a resistor and a capacitor (but no inductor).
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