Electrical Engineering

Rlc Circuits And Resonance MCQs

Practice Rlc Circuits And Resonance MCQs for competitive exams.

Rlc Circuits And Resonance MCQs

Practice questions from this topic.

A resonant circuit has a lower critical frequency of 7 kHz and an upper critical frequency of 13 kHz. The bandwidth of the circuit is

A. 6 kHz
B. 13 kHz
C. 20 kHz
D. 4 kHz

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X L and X C have opposing effects in an RLC circuit.

A. True
B. False

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A 24 Ω resistor, an inductor with a reactance of 120 Ω, and a capacitor with a reactance of 120 Ω are in series across a 60 V source. The circuit is at resonance. The voltage across the inductor is

A. 60 V
B. 660 V
C. 30 V
D. 300 V

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The quality factor (Q) is the ratio of true power to apparent power.

A. True
B. False

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A 90 Ω resistor, a coil with 30 Ω of reactance, and a capacitor with 50 Ω of reactance are in series across a 12 V ac source. The current through the resistor is

A. 9 mA
B. 90 mA
C. 13 mA
D. 130 mA

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At series resonance, the inductive reactance and capacitive reactance are never equal.

A. True
B. False

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A 10 Ω resistor, a 90 mH coil, and a 0.015 µF capacitor are in series across an ac source. The impedance magnitude at 1,200 Hz below f r is

A. 1,616 Ω
B. 161 Ω
C. 3,387 Ω
D. 1,771 Ω

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A series resonant circuit is commonly called a tank circuit.

A. True
B. False

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In a series RLC circuit, the current is minimum at resonance.

A. True
B. False

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A 15 Ω resistor, a 220 µH coil, and a 60 pF capacitor are in series across an ac source. What is the bandwidth of the circuit?

A. 138 MHz
B. 10,866 Hz
C. 1,907 Hz
D. 138 kHz

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In a certain series resonant circuit, V C = 125 V, V L = 125 V, and V R = 40 V. The value of the source voltage is

A. 125 V
B. 250 V
C. 290 V
D. 40 V

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A resistor of 3 kΩ, a 0.05 µF capacitor, and a 120 mH coil are in series across a 5 kHz, 20 V ac source. What is the impedance, expressed in polar form?

A. 636 Ω
B. 3,769 Ω
C. 433 Ω
D. 4,337 Ω

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Rlc Circuits And Resonance MCQs

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Rlc Circuits And Resonance MCQs

A resonant circuit has a lower critical frequency of 7 kHz and an upper critical frequency of 13 kHz. The bandwidth of the circuit is

X L and X C have opposing effects in an RLC circuit.

A 24 Ω resistor, an inductor with a reactance of 120 Ω, and a capacitor with a reactance of 120 Ω are in series across a 60 V source. The circuit is at resonance. The voltage across the inductor is

The quality factor (Q) is the ratio of true power to apparent power.

A 90 Ω resistor, a coil with 30 Ω of reactance, and a capacitor with 50 Ω of reactance are in series across a 12 V ac source. The current through the resistor is

At series resonance, the inductive reactance and capacitive reactance are never equal.

A 10 Ω resistor, a 90 mH coil, and a 0.015 µF capacitor are in series across an ac source. The impedance magnitude at 1,200 Hz below f r is

A series resonant circuit is commonly called a tank circuit.

In a series RLC circuit, the current is minimum at resonance.

A 15 Ω resistor, a 220 µH coil, and a 60 pF capacitor are in series across an ac source. What is the bandwidth of the circuit?

In a certain series resonant circuit, V C = 125 V, V L = 125 V, and V R = 40 V. The value of the source voltage is

A resistor of 3 kΩ, a 0.05 µF capacitor, and a 120 mH coil are in series across a 5 kHz, 20 V ac source. What is the impedance, expressed in polar form?