Transistor Amplifier Questions and Answers pdf
1. CE amplifier is also known as ___________ circuit
A. grounded emitter
B grounded base
C. grounded collector
D. neither of the above
Answer: Option A
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| Transistor Amplifier Questions and Answers pdf |
2. A transistor amplifier has high output impedance because ___________
A. The emitter is heavily doped
B. the collector is reverse biased
C. collector is wider than emitter or base
D. neither of the above
Answer: Option B
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3. The power gain of an amplifier is 100. Its dB gain is ___________
A 10dB
B 20dB
C. 40dB
D. neither of the above
Answer: Option B
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4. In a single stage transistor amplifier, Rc and Rl represent the collector
resistance and load resistance respectively. Transistor a D.C. sees load of ___________
a rc + rl
b rc || rl
crl
DRC
Answer: Option D
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5. A D.C. single stage transistor amplifier with collector load Rc and emitter resistance Re. load of ___________
ARC
b rc || again
C. rc - re
D. RC + RE
Answer: Option D
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6. D.C. The load of a transistor amplifier is usually ___________ that of an a.c. Of Burden
A. similar to
B. Less
more than c.
D. neither of the above
Answer: Option C
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7. If a transistor amplifier feeds a load of low resistance (such as a speaker), the voltage gain will be ___________
the high
b too much
c medium
D. Less
Answer: Option D
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8. If RC and RL represent collector resistance and load resistance
respectively in a single stage transistor amplifier, then a.c. load is
a rl+rc
b rc || rl
c rl - rc
DRC
Answer: Option B
9. It is generally desired that a transistor should have ___________ input
competition
A. less
B very few
c high
D. Very high
Answer: Option C
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10. For the highest power gain, one would use a ___________ configuration
acc
b cb
c ce
d none of the above
Answer: Option C
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Single Stage Transistor Amplifier Question Answer in hindi
Transistor Amplifier Questions and Answers pdf
11. In transistor amplifier, we generally use ___________ capacitors.
A. electrolytic
B. Mica
c paper
D. Air
Answer: Option A
12. The input capacitor in an amplifier is ___________ capacitor
A coupling
B bypass
c leak
D. neither of the above
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13. In CE amplifier, voltage gain = ___________ *RAC/Rin
A α
b 1 + α
C. 1 + β
D. β
Answer: Option D
14. A single stage transistor amplifier consists of ___________ and associated circuitry
A. two transistors
B. a transistor
C. three transistors
D. neither of the above
Answer: Option B
15. The slope of a.c. load line is ___________ that of d.c. wharf
A. similar to
B. more than
less than c.
D. neither of the above
Answer: Option B
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16. CC configuration is used for impedance matching because it ___________
A. Input impedance is too high
B. Input impedance is low
C. Output impedance is too low
D. neither of the above
Answer: Option A
17. If a transistor amplifier draws 2mA when the input voltage is 10 V, then its input impedance is ___________
A 20 kΩ
B 2 kΩ
C. 10 kΩ
D. 5 kΩ
Answer: Option D
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18. The value of collector load RC in a transistor amplifier is the output impedance of the transistor.
A. similar to
B. Less
more than c.
D. neither of the above
Answer: Option B
19. The purpose of the emitter capacitor (i.e. the capacitor across RE) is to
,
A. Avoid voltage gain drop
B. emitter forward bias
C. reduce noise in the amplifier
D. neither of the above
Answer: Option A
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20. A single stage transistor amplifier with no load is an A.C. sees load of
a rc+re
B r c
C. RC || again
D. RC/RE
Answer: Option B
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21. The purpose of a capacitor in a transistor amplifier is to ___________
A. protect the transistor
B. cool the transistor
C. Coupled or Bypass AC Component
D. provide bias
Answer: Option C
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22. The purpose of coupling capacitor in a transistor amplifier is to
,
A. Increase the output impedance of the transistor
B protect the transistor
Sea Pass AC and Block D.C.
D. provide bias
Answer: Option C
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23. If the input capacitor of a transistor amplifier is short circuited, then
A. the transistor will be destroyed
B. bias condition will change
C. signal will not reach the base
D. neither of the above
Answer: Option B
24. The phase difference between the output and input voltages of a CE amplifier is ___________
A. 180 degree
B 0 degree
C. 90 degrees
D. 270 degree
Answer: Option A
25. The ratio of the output impedance of a CE amplifier to ___________
a. about 1
Blow
c high
D Medium
Answer: Option D
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26. In a CE amplifier, the phase difference between the voltage across the collector load RC and the signal voltage is ___________
A 180 D
degrees
B 270 degree
C. 90 degrees
D. 0 degree
Answer: Option D
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27. D.C. Equivalent circuit of a transistor amplifier, the capacitor is assumed to be ___________
a small
b open
C. partially shortened
D. neither of the above
Answer: Option B
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28. A.C. Equivalent circuit of a transistor amplifier, the capacitor is assumed to be ___________
a small
b open
C. partially open
D. neither of the above
Answer: Option A
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29. D.C. The purpose of a transistor is to ___________ state
reverse bias the emitter
B. advance the collector
C. set operating point
D. neither of the above
Answer: Option C
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30. The output power of a transistor amplifier is more than the input power because the extra power is supplied by ___________
a transistor
B biasing circuit
C. collector supply VCC
D. neither of the above
Answer: Option C
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31. Point of intersection of DC. and AC load line is called ___________
A. saturation point
B cut off point
c operating point
D. neither of the above
Answer: Option C
32. The radio wave picked up by the receiving antenna is amplified several times to get proper sound output.
A 1000
b one lakh
C 100
D 10000
Answer: Option B
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33. If the power and current gains of a transistor amplifier are 16500 and 100 respectively, then the voltage gain is
A 165
B 165 x 104
C 100
D. neither of the above
Answer: Option A
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34. If the collector supply is 10V, the collector cuts off the voltage under DC. The conditions are ___________
A 20 V
B 5 V
C. 2 V
D. 10 V
Answer: Option D
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35. A transistor used to obtain high voltage from a transistor amplifier should have ___________.
A. thin base
B. Thin collector
C. wide emitter
D. neither of the above
Answer: Option A
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