Multistage Transistor Amplifiers 1 MCQ

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Attempt Free Multistage Transistor Amplifiers 1 MCQ Here. Read The Important Electricity MCQ From Below.

Q1. A radio receiver has …………… of amplification

One stage
Two stages
Three stages
More than one stages

Answer : 4

Q2. RC coupling is used for ………………. amplification

Voltage
Current
Power
None of the above

Answer : 1

Q3. In an RC coupled amplifier, the voltage gain over mid-frequency range …………….

Changes abruptly with frequency
Is constant
Changes uniformly with frequency
None of the above

Answer : 2

Q4. In obtaining the frequency response curve of an amplifier, the …………

Amplifier level output is kept constant
Amplifier frequency is held constant
Generator frequency is held constant
Generator output level is held constant

Answer : 4

Q5. An advantage of RC coupling scheme is the ………….

Good impedance matching
Economy
High efficiency
None of the above

Answer : 2

Multistage Transistor Amplifiers 1 MCQ

Q6. The best frequency response is of ………. coupling

RC
Transformer
Direct
None of the above

Answer : 3

Q7. Transformer coupling is used for ………….. amplification

Power
Voltage
Current
None of the above

Answer : 1

Q8. In an RC coupling scheme, the coupling capacitor CC must be large enough ………..

To pass d.c. between the stages
Not to attenuate the low frequencies
To dissipate high power
None of the above

Answer : 2

Q9. In RC coupling, the value of coupling capacitor is about ……….

100 pF
0.1 µF
0.01 µF
10 µF

Answer : 4

Q10. The noise factor of an ideal amplifier expressed in db is …………..

0
1
1
10

Answer : 1

Multistage Transistor Amplifiers 1 MCQ

Q11. When a multistage amplifier is to amplify d.c. signal, then one must use …….. coupling

RC
Transformer
Direct
None of the above

Answer : 3

Q12. ………….. coupling provides the maximum voltage gain

RC
Transformer
Direct
Impedance

Answer : 2

Q13. In practice, voltage gain is expressed ……………

In db
In volts
As a number
None of the above

Answer : 1

Q14. Transformer coupling provides high efficiency because …………

Collector voltage is stepped up
c. resistance is low
collector voltage is stepped down
none of the above

Answer : 2

Q15. Transformer coupling is generally employed when load resistance is ………

Large
Very large
Small
None of the above

Answer : 3

Multistage Transistor Amplifiers 1 MCQ

Q16. If a three-stage amplifier has individual stage gains of 10 db, 5 db and 12 db, then total gain in db is ……….

600 db
24 db
14 db
27 db

Answer : 4

Q17. The final stage of a multistage amplifier uses ………………

RC coupling
Transformer coupling
Direct coupling
Impedance coupling

Answer : 2

Q18. The ear is not sensitive to ………….

Frequency distortion
Amplitude distortion
Frequency as well as amplitude distortion
None of the above

Answer : 1

Q19. RC coupling is not used to amplify extremely low frequencies because ………

There is considerable power loss
There is hum in the output
Electrical size of coupling capacitor becomes very large
None of the above

Answer : 3

Q20. In transistor amplifiers, we use ……………. transformer for impedance matching

Step up
Step down
Same turn ratio
None of the above

Answer : 2

Multistage Transistor Amplifiers 1 MCQ

Q21. The lower and upper cut off frequencies are also called ………………… frequencies

Sideband
Resonant
Half-resonant
Half-power

Answer : 4

Q22. A gain of 1,000,000 times in power is expressed by …………….

30 db
60 db
120 db
600 db

Answer : 2

Q23. A gain of 1000 times in voltage is expressed by …………..

60 db
30 db
120 db
600 db

Answer : 1

Q24. 1 db corresponds to ………….. change in power level

50%
35%
26%
22%

Answer : 3

Q25. 1 db corresponds to …………. change in voltage or current level

40%
80%
20%
25%

Answer : 1

Multistage Transistor Amplifiers 1 MCQ

Q26. The frequency response of transformer coupling is ………….

Good
Very good
Excellent
Poor

Answer : 4

Q27. In the initial stages of a multistage amplifier, we use ………..

RC coupling
Transformer coupling
Direct coupling
None of the above

Answer : 1

Q28. The total gain of a multistage amplifier is less than the product of the gains of individual stages due to …………

Power loss in the coupling device
Loading effect of the next stage
The use of many transistors
The use of many capacitors

Answer : 2

Q29. The gain of an amplifier is expressed in db because ………..

It is a simple unit
Calculations become easy
Human ear response is logarithmic
None of the above

Answer : 3

Q30. If the power level of an amplifier reduces to half, the db gain will fall by …….

5 db
2 db
10 db
3 db

Answer : 4

Multistage Transistor Amplifiers 1 MCQ

Q31. A current amplification of 2000 is a gain of …………….

3 db
66 db
20 db
200 db

Answer : 2

Q32. An amplifier receives 0.1 W of input signal and delivers 15 W of signal power. What is the power gain in db?

8 db
6 db
5 db
4 db

Answer : 1

Q33. The power output of an audio system is 18 W. For a person to notice an increase in the output (loudness or sound intensity) of the system, what must the output power be increased to ?

2 W
6 W
68 W
None of the above

Answer : 3

Q34. The output of a microphone is rated at -52 db. The reference level is 1V under specified conditions. What is the output voltage of this microphone under the same sound conditions?

5 mV
2 mV
8 mV
5 mV

Answer : 4

Q35. RC coupling is generally confined to low power applications because of ………

Large value of coupling capacitor
Low efficiency
Large number of components
None of the above

Answer : 2

Multistage Transistor Amplifiers 1 MCQ

Q36. The number of stages that can be directly coupled is limited because ……..

Changes in temperature cause thermal instability
Circuit becomes heavy and costly
It becomes difficult to bias the circuit
None of the above

Answer : 1

Q37. The purpose of RC or transformer coupling is to …………

Block a.c.
Separate bias of one stage from another
Increase thermal stability
None of the above

Answer : 2