Exercise: Rlc Circuits And Resonance
Questions for: Rlc Circuits And Resonance
A 200 
resistor, a coil with 30 of reactance, and a capacitor of unknown reactance are in series across an ac source. The circuit is at resonance. Circuit impedance
resistor, a coil with 30 of reactance, and a capacitor of unknown reactance are in series across an ac source. The circuit is at resonance. Circuit impedance
A:
is 230
B:
is 170
C:
is 200
D:
cannot be determined
Answer: C
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Referring to Problem 20, what is the total parallel resistance (Rp(tot))?
A:
4.99
B:
499
C:
4,992
D:
6,800
Answer: C
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A 6.8 k resistor, a 7 mH coil, and a 0.02 
F capacitor are in parallel across a 17 kHz ac source. The coil's internal resistance, RW, is 30 . The equivalent parallel resistance, Rp(eq), is
resistor, a 7 mH coil, and a 0.02 F capacitor are in parallel across a 17 kHz ac source. The coil's internal resistance, RW, is 30 . The equivalent parallel resistance, Rp(eq), is
A:
1,878
B:
18,780
C:
18,750
D:
626
Answer: B
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The impedance at the resonant frequency of a series RLC circuit with L = 20 mH, C = 0.02 F, and RW = 90 is
F, and RW = 90 is
A:
0
B:
90
C:
20 k
D:
40 k
Answer: B
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