# RLC Circuits and Resonance

• ## A 15 Ω resistor, an inductor with 8 Ω inductive reactance, and a capacitor with 12 Ω capacitive reactance are in parallel across an ac voltage source. The circuit impedance is_____.

• A. 12.7 Ω
• B. 127 Ω
• C. 4,436 Ω
• D. 6,174 Ω
Explanation:

No answer description available for this question

• ## A 6.8 kΩ resistor, a 7 mH coil, and a 0.02 µF capacitor are in parallel across a 17 kHz ac source. The coil’s internal resistance, RW, is 30 Ω. The equivalent parallel resistance, Rp(eq), is_____.

• A. 1,878 Ω
• B. 18,780 Ω
• C. 18,750 Ω
• D. 626 Ω
Explanation:

No answer description available for this question

• ## 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
Explanation:

No answer description available for this question

• ## A certain series RLC circuit with a 200 Hz, 15 V ac source has the following values: R = 12 Ω, C = 80 µF, and L = 10 mH. The total impedance, expressed in polar form, is_____.

• A. 12.28 ∠12.34° Ω
• B. 12.57 ∠12.34° Ω
• C. 9.95 ∠12.34° Ω
• D. 12.62 ∠12.34° Ω
Explanation:

No answer description available for this question

• ## The impedance at the resonant frequency of a series RLC circuit with L = 20 mH, C = 0.02 µF, and RW = 90 Ω is_____.

• A. 0 Ω
• B. 90 Ω
• C. 20 Ω
• D. 40 Ω
Explanation:

No answer description available for this question

• ## 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
Explanation:

No answer description available for this question

• ## A 9 mH coil is in parallel with a 0.015 µF capacitor across an 18 kHz ac source. The coil’s internal resistance RW, is 60 Ω. The circuit impedance is_____.

• A. 17,340 Ω
• B. 1,734 Ω
• C. 290 Ω
• D. 1,018 Ω
Explanation:

No answer description available for this question

• ## 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
Explanation:

No answer description available for this question

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

• A. True
• B. False
Explanation:

No answer description available for this question

• A. True
• B. False