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.Management Sciences
Category: Transistor Tuned Amplifiers
For frequencies below the resonant frequency , a parallel LC circuit behaves as a ______________load?
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A. Inductive
B. Resistive
C. Capacitive
D. None of the above
At series resonance, the net reactive component of circuit current is _______________?
A. Zero
B. Inductive
C. Capacitive
D. None of the above
For frequencies above the resonant frequency, a parallel LC circuit behaves as a ____________ load?
A. Capacitive
B. Resistive
C. Inductive
D. None of the above
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 series resonance, voltage across L is____________voltage across C?
A. Equal to but opposite in phase to
B. Equal to but in phase with
C. Greater than but in phase with
D. Less than but in phase with
A tuned amplifier is used in ___________ applications?
A. Radio frequency
B. Low frequency
C. Audio frequency
D. None of the above
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
A class C amplifier always drives _____________load?
A. A pure resistive
B. A pure inductive
C. A pure capacitive
D. A resonant tank
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
The Q of an LC circuit is given by _________________?
A. 2pfr x R
B. R / 2pfrL
C. 2pfrL / R
D. R2/2pfrL
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