Exercise: Rlc Circuits And Resonance

Questions for: Rlc Circuits And Resonance

A 15 resistor, an inductor with 8 inductive reactance, and a capacitor with 12 capacitive reactance are in parallel across an ac voltage source. The circuit impedance is
A:
12.7
B:
127
C:
4,436
D:
6,174
Answer: A
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A 9 mH coil is in parallel with a 0.015 F capacitor across an 18 kHz ac source. The coil's internal resistance, RW, is 60 . The circuit impedance is
A:
17,340
B:
1,734
C:
290
D:
1,018
Answer: A
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A certain series resonant circuit has a bandwidth of 2 kHz. If the existing coil is replaced with one having a higher value of Q, the bandwidth will
A:
increase
B:
remain the same
C:
decrease
D:
be less selective
Answer: C
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In a certain series resonant circuit, VC = 125 V, VL = 125 V, and VR = 40 V. The value of the source voltage is
A:
125 V
B:
250 V
C:
290 V
D:
40 V
Answer: D
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To tune a parallel resonant circuit to a higher frequency, the capacitance should be
A:
increased
B:
decreased
C:
left alone
D:
replaced with inductance
Answer: B
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