Tuned class C amplifiers are used for RF signals of________________?
A. Low power
B. High power
C. Very high power
D. None of the above
Month: December 2018
Double tuned circuits are used in ____________ stages of a radio receiver?
Double tuned circuits are used in ____________ stages of a radio receiver?
A. IF
B. Audio
C. Output
D. None of the above
In the double tuned circuit, if the mutual inductance between the two tuned circuits is decreased, the level of resonance curve ___________________?
In the double tuned circuit, if the mutual inductance between the two tuned circuits is decreased, the level of resonance curve ___________________?
A. Remains the same
B. Is lowered
C. Is raised
D. None of the above
In parallel resonance, there is _______________?
In parallel resonance, there is _______________?
A. Both voltage and current amplification
B. Voltage amplifications
C. Current amplification
D. None of the above
If a high degree of selectivity is desired, then double-tuned circuit should have ___________ coupling?
If a high degree of selectivity is desired, then double-tuned circuit should have ___________ coupling?
A. Loose
B. Tight
C. Critical
D. None of the above
For frequencies above the resonant frequency, a parallel LC circuit behaves as a ____________ load?
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
In series resonance, there is__________________?
In series resonance, there is__________________?
A. Voltage amplification
B. Current amplification
C. Both voltage and current amplification
D. None of the above
Frequencies above ______________ kHz are called radio frequencies?
Frequencies above ______________ kHz are called radio frequencies?
A. 2
B. 10
C. 50
D. 200
The Q of a tuned circuit refers to the property of_______________?
The Q of a tuned circuit refers to the property of_______________?
A. Sensitivity
B. Fidelity
C. Selectivity
D. None of the above
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