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multi stage transistor amplifiers MCQs

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

multi stage transistor amplifiers Mcqs

1. In RC coupling, the value of coupling capacitor is about_______________?
0

A. 10 F

B. 100 pF

C. 0.01 F

D. 0.1 F

2. In an RC coupled amplifier, the voltage gain over mid-frequency range_____________?
0

A. None of the above

B. Is constant

C. Changes abruptly with frequency

D. Changes uniformly with frequency

3. An amplifier receives 0.1 W of input signal and delivers 15 W of signal power. What is the power gain in db?
0

A. 4 db

B. 8 db

C. 6 db

D. 5 db

4. A current amplification of 2000 is a gain of_________________?
0

A. 200 db

B. 3 db

C. 66 db

D. 20 db

5. The noise factor of an ideal amplifier expressed in db is_____________?
0

A. 1

B. 1

C. 10

D. 0

6. A gain of 1,000,000 times in power is expressed by_____________?
0

A. 600 db

B. 120 db

C. 30 db

D. 60 db

7. The number of stages that can be directly coupled is limited because___________?
0

A. None of the above

B. Changes in temperature cause thermal instability

C. Circuit becomes heavy and costly

D. It becomes difficult to bias the circuit

8. In the initial stages of a multistage amplifier, we use______________?
0

A. None of the above

B. RC coupling

C. Direct coupling

D. Transformer coupling

9. Transformer coupling provides high efficiency because___________?
0

A. resistance is low

B. none of the above

C. Collector voltage is stepped up

D. collector voltage is stepped down

10. 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?
0

A. 2 mV

B. 8 mV

C. 5 mV

D. 5 mV

11. RC coupling is not used to amplify extremely low frequencies because____________?
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A. Electrical size of coupling capacitor becomes very large

B. There is considerable power loss

C. None of the above

D. There is hum in the output

12. The bandwidth of a single stage amplifier is_____________that of a multistage amplifier?
0

A. Data insufficient

B. The same as

C. Less than

D. More than

13. The value of emitter capacitor CE in a multistage amplifier is about____________?
0

A. 50 F

B. 1 F

C. 100 pF

D. 0.01 F

14. A gain of 1000 times in voltage is expressed by_______________?
0

A. 120 db

B. 600 db

C. 30 db

D. 60 db

15. RC coupling is used for_____________amplification?
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A. Power

B. Voltage

C. Current

D. None of the above

16. In practice, voltage gain is expressed______________?
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A. None of the above

B. In db

C. In volts

D. As a number

17. In transistor amplifiers, we use_____________transformer for impedance matching?
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A. e of the above

B. Same turn ratio

C. Step down

D. Step up

18. 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 ?
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A. 6 W

B. 68 W

C. 2 W

D. None of the above

19. The upper or lower cut off frequency is also called______________frequency?
0

A. 3 db

B. Sideband

C. None of the above

D. Resonant

20. The ear is not sensitive to___________?
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A. Amplitude distortion

B. Frequency distortion

C. e of the above

D. Frequency as well as amplitude distortion

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