A. XL increases and XC decreases
B. XL decreases and XC increases
C. Both XL and XC increase
D. Both XL and XC decrease
✅ The correct answer is option A.
Transistor Tuned Amplifiers MCQs
A resonant circuit contains ____________elements?
A. R and L only
B. R and C only
C. Only R
D. L and C
✅ The correct answer is option D.
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 correct answer is option D.
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 correct answer is option A.
At series resonance, the circuit offers____________ impedance?
A. Zero
B. Maximum
C. Minimum
D. None of the above
✅ The correct answer is option C.
The Q of a tuned circuit refers to the property of_______________?
A. Sensitivity
B. Fidelity
C. Selectivity
D. None of the above
✅ The correct answer is option C.
A tuned amplifier is used in ___________ applications?
A. Radio frequency
B. Low frequency
C. Audio frequency
D. None of the above
✅ The correct answer is option A.
At parallel resonance, the ratio L/C is ______________?
A. Very large
B. Zero
C. Small
D. None of the above
✅ The correct answer is option A.
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
✅ The correct answer is option B.
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
✅ The correct answer is option A.