1. The output stage of a multistage amplifier usually employs______________?
A. Push-pull amplifier
B. Preamplifier
C. Class A power amplifier
D. None of the above
✅ The correct answer is option A.
Transistor Audio Power Amplifiers MCQs
2. A 2-transistor class B power amplifier is commonly called ______________ amplifier?
A. Dual
B. Push-pull
C. Symmetrical
D. Differential
✅ The correct answer is option B.
3. The most costly coupling is _______________ coupling?
A. RC
B. Direct
C. Impedance
D. Transformer
✅ The correct answer is option D.
4. An AF amplifier is shielded to ________________?
A. Keep the amplifier cool
B. Protect from rusting
C. Prevent induction due to stray magnetic fields
D. None of the above
✅ The correct answer is option C.
5. If the zero signal dissipation of a transistor is 1W, then power rating of the transistor should be at least___________________?
A. 5 W
B. 33 W
C. 75 W
D. 1 W
✅ The correct answer is option D.
6. Class C amplifiers are used as ___________________?
A. AF amplifiers
B. Detectors
A. amplifiers
C. None of the above
✅ The correct answer is option A.
7. The disadvantage of impedance matching is that it _______________?
A. Gives distorted output
B. Gives low power output
C. Requires a transformer
D. None of the above
✅ The correct answer is option A.
8. A transformer coupled class A power amplifier has a load of 100 O on the secondary. If the turn ratio is 10:1, what is the value of load appearing on the primary?
A. 5 kO
B. 20 kO
C. 100 kO
D. 10 kO
✅ The correct answer is option D.
9. The size of a power transistor is made considerably large to________________?
A. Provide easy handling
B. Dissipate heat
C. Facilitate connections
D. None of the above
✅ The correct answer is option B.
10. The most important consideration in power amplifier is __________________?
A. Biasing the circuit
B. Collector efficiency
C. To keep the transformer cool
D. None of the above
✅ The correct answer is option B.