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single stage transistor amplifiers MCQs

Practise focused single stage transistor amplifiers questions with marked answers for exam preparation and subject revision.

single stage transistor amplifiers Mcqs

1. The purpose of capacitors in a transistor amplifier is to___________________?
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A. Couple or bypass a.c. component

B. Provide biasing

C. Protect the transistor

D. Cool the transistor

2. In the zero signal conditions, a transistor sees _____________ load?
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A. c.

B. c.

C. both d.c. and a.c.

D. none of the above

3. The purpose of d.c. conditions in a transistor is to___________________?
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A. None of the above

B. Set up operating point

C. Reverse bias the emitter

D. Forward bias the collector

4. The purpose of a coupling capacitor in a transistor amplifier is to ___________________?
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A. Protect the transistor

B. Increase the output impedance of transistor

C. Provide biasing

D. Pass a.c. and block d.c.

5. In the a.c. equivalent circuit of a transistor amplifier, the capacitors are considered ___________________?
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A. Open

B. Partially open

C. None of the above

D. Short

6. If the collector supply is 10V, then collector cut off voltage under d.c. conditions is _______________?
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A. 2 V

B. 10 V

C. 20 V

D. 5 V

7. A single stage transistor amplifier with collector load RC and emitter resistance RE has a d.c. load of ________________________?
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A. RC RE

B. RC || RE

C. RC + RE

D. RC

8. The input capacitor in an amplifier is the______________ capacitor?
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A. Leakage

B. Coupling

C. Bypass

D. None of the above

9. If a transistor amplifier draws 2mA when input voltage is 10 V, then its input impedance is ____________?
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A. 5 k?

B. 10 k?

C. 20 k?

D. 2 k?

10. The output power of a transistor amplifier is more than the input power because the additional power is supplied by__________________?
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A. Biasing circuit

B. None of the above

C. Transistor

D. Collector supply VCC

11. The d.c. load of a transistor amplifier is generally_______________ that of a a.c. load?
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A. None of the above

B. Less than

C. More than

D. The same as

12. The phase difference between the output and input voltages of a CE amplifier is _____________?
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A. 180o

B. 0o

C. 90o

D. 270o

13. In a CE amplifier, the phase difference between voltage across collector load RC and signal voltage is _________________?
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A. 270o

B. 180o

C. 90o

D. 0o

14. If RC and RL represent the collector resistance and load resistance respectively in a single stage transistor amplifier, then a.c. load is____________________?
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A. RC

B. RL + RC

C. RC || RL

D. RL RC

15. In a single stage transistor amplifier, RC and RL represent collector resistance and load resistance respectively. The transistor sees a d.c. load of _____________________?
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A. RL

B. RC || RL

C. RC

D. RC + RL

16. It is generally desired that a transistor should have_____________________ input impedance?
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A. Very low

B. High

C. Very high

D. Low

17. A transistor converts __________________?
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A. c. power into a.c. power

B. c. power into d.c. power

C. high resistance into low resistance

D. none of the above

18. CC configuration is used for impedance matching because its ________________?
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A. None of the above

B. Input impedance is very high

C. Input impedance is low

D. Output impedance is very low

19. The value of collector load RC in a transistor amplifier is _______________the output impedance of the transistor?
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A. None of the above

B. Less than

C. The same as

D. More than

20. The ratio of output impedance of a CE amplifier is _______________?
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A. High

B. Low

C. About 1

D. Moderate

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