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RLC Circuits and Resonance MCQs

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22. Current in a series RLC circuit may always be used as:
A. a leading vector
B. a reference
C. an angle
D. a lagging vector
Discussion
23. What is the approximate phase angle in a series RLC circuit when VC = 117 V, VR = 14.5 V, and VL = 3.3 V?
A. –45.0 degrees
B. –82.7 degrees
C. –90.0 degrees
D. –172.7 degrees
Discussion
24. Which statement best describes reactance in a series RLC circuit?
A. Capacitive reactance is always dominant.
B. Inductive reactance is always dominant.
C. Resistance is always dominant.
D. The larger of the two reactances is dominant.
Discussion
25. What is the band pass (F1 – F2) of an RLC filter that resonates at 150 kHz and has a coil Q of 30?
A. 100.0 kHz to 155.0 kHz
B. 147.5 kHz to 152.5 kHz
C. 295.5 kHz to 4500 kHz
D. 149,970 Hz to 150,030 Hz
Discussion
26. What would be the power factor for an RLC circuit that acts inductively?
A. +90 degrees leading
B. one
C. zero
D. –90 degrees lagging
Discussion
27. Voltage lags current in an RLC circuit when it acts:
A. capacitively
B. resistively
C. inductively
D. resonantly
Discussion
28. When a parallel tank is used in series with an output load resistor the filter is a(n) ______ filter.
A. band-stop
B. low-pass
C. bandpass
D. high-pass
Discussion

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