rlc-circuits-and-resonance electronics question and answers -Page 5

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RLC Circuits and Resonance problems

1.

What is the impedance of the circuit in the given circuit?
Options
A. 1.05 kΩ
B. 1.33 kΩ
C. 2.19 kΩ
D. 3.39 kΩ

Correct Answer: 1.05 kΩ

2. At any resonant frequency, what net voltage is measured across the two series reactive components?
Options
A. Applied voltage
B. Reactive voltage
C. Zero voltage
D. V_L + V_C voltage

Correct Answer: Zero voltage

3. What is the Q (Quality factor) of a series circuit that resonates at 6 kHz, has equal reactance of 4 kilo-ohms each, and a resistor value of 50 ohms?
Options
A. 0.001
B. 50
C. 80
D. 4.0

Correct Answer: 80

4. In a series RLC circuit the current can be found using:
Options
A.
B.
C. both of the above
D. none of the above

Correct Answer: both of the above

5. What is the phase angle?
Options
A. 61.4�
B. 28.5�
C. -28.5�
D. -61.4�

Correct Answer: -28.5�

6.
What is the resonant frequency in the given circuit?
Options
A. 11.6 Hz
B. 275.8 Hz
C. 1.5 kHz
D. 3.2 kHz

Correct Answer: 3.2 kHz

7. The resonant frequency f_o is 19 kHz.
Options
A. True
B. False

Correct Answer: False

8. When inductive and capacitive reactance are present in the same series circuit, the magnitude of the total reactance is equal to the sum of the magnitudes of the individual reactances.
Options
A. True
B. False

Correct Answer: False

9. The quality factor of a parallel circuit at resonance is V_C/V_S or V_L/V_S.
Options
A. True
B. False

Correct Answer: True

10. The less selective a filter is, the steeper the slope of its curves at the cutoff frequencies.
Options
A. True
B. False

Correct Answer: False

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