The Q of a tuned circuit refers to the property of_______________?
A. Sensitivity
B. Fidelity
C. Selectivity
D. None of the above
Transistor Tuned Amplifiers
In a parallel LC circuit, if the signal frequency is decreased below the resonant frequency, then________________?
In a parallel LC circuit, if the signal frequency is decreased below the resonant frequency, then________________?
A. XL decreases and XC increases
B. XL increases and XC decreases
C. Line current becomes minimum
D. None of the above
The Q of a tuned amplifier is 50. If the resonant frequency for the amplifier is 1000kHZ, then bandwidth is __________________?
The Q of a tuned amplifier is 50. If the resonant frequency for the amplifier is 1000kHZ, then bandwidth is __________________?
A. 10kHz
B. 40 kHz
C. 30 kHz
D. 20 kHz
For frequencies above the resonant frequency , a series LC circuit behaves as a ____________load?
For frequencies above the resonant frequency , a series LC circuit behaves as a ____________load?
A. Resistive
B. Inductive
C. Capacitive
D. None of the above
A class C amplifier always drives _____________load?
A class C amplifier always drives _____________load?
A. A pure resistive
B. A pure inductive
C. A pure capacitive
D. A resonant tank
For frequencies below the resonant frequency , a parallel LC circuit behaves as a ______________load?
For frequencies below the resonant frequency , a parallel LC circuit behaves as a ______________load?
A. Inductive
B. Resistive
C. Capacitive
D. None of the above
In the above question, what are the values of cut-off frequencies?
In the above question, what are the values of cut-off frequencies?
A. 140 kHz , 60 kHz
B. 1020 kHz , 980 kHz
C. 1030 kHz , 970 kHz
D. None of the above
At parallel resonance, the phase angle between the applied voltage and circuit current is _____________?
At parallel resonance, the phase angle between the applied voltage and circuit current is _____________?
A. 90o
B. 180o
C. 0o
D. None of the above
At parallel resonance, the ratio L/C is ______________?
At parallel resonance, the ratio L/C is ______________?
A. Very large
B. Zero
C. Small
D. None of the above
If L/C ratio of a parallel LC circuit is increased, the Q of the circuit______________?
If L/C ratio of a parallel LC circuit is increased, the Q of the circuit______________?
A. Is decreased
B. Is increased
C. Remains the same
D. None of the above