1. 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
✅ The correct answer is option C.
Transistor Tuned Amplifiers MCQs
2. At parallel resonance, the net reactive component circuit current is _______________?
A. Capacitive
B. Zero
C. Inductive
D. None of the above
✅ The correct answer is option B.
3. 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
✅ The correct answer is option B.
4. A tuned amplifier is generally operated in ____________operation?
A. Class A
B. Class C
C. Class B
D. None of the above
✅ The correct answer is option B.
5. A class C amplifier always drives _____________load?
A. A pure resistive
B. A pure inductive
C. A pure capacitive
D. A resonant tank
✅ The correct answer is option D.
6. The voltage gain of a tuned amplifier is____________at resonant frequency
A. Minimum
B. Maximum
C. Half-way between maximum and minimum
D. Zero
✅ The correct answer is option B.
7. 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
✅ The correct answer is option B.
8. 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
✅ The correct answer is option A.
9. At parallel resonance, the line current is_______________?
A. Minimum
B. Maximum
C. Quite large
D. None of the above
✅ The correct answer is option A.
10. A tuned amplifier uses__________load?
A. Resistive
B. Capacitive
C. LC tank
D. Inductive
✅ The correct answer is option C.