Multi Stage Transistor Amplifiers Mcqs - Set 1

1)   A gain of 1000 times in voltage is expressed by_______________?

a. 60 db
b. 30 db
c. 120 db
d. 600 db
Answer  Explanation 

ANSWER: 60 db

Explanation:
No explanation is available for this question!


2)   The upper or lower cut off frequency is also called______________frequency?

a. Resonant
b. Sideband
c. 3 db
d. None of the above
Answer  Explanation 

ANSWER: 3 db

Explanation:
No explanation is available for this question!


3)   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 ?

a. 2 W
b. 6 W
c. 68 W
d. None of the above
Answer  Explanation 

ANSWER: 68 W

Explanation:
No explanation is available for this question!


4)   The number of stages that can be directly coupled is limited because___________?

a. Changes in temperature cause thermal instability
b. Circuit becomes heavy and costly
c. It becomes difficult to bias the circuit
d. None of the above
Answer  Explanation 

ANSWER: Changes in temperature cause thermal instability

Explanation:
No explanation is available for this question!


5)   The bandwidth of a single stage amplifier is_____________that of a multistage amplifier?

a. More than
b. The same as
c. Less than
d. Data insufficient
Answer  Explanation 

ANSWER: More than

Explanation:
No explanation is available for this question!


6)   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?

a. 5 mV
b. 2 mV
c. 8 mV
d. 5 mV
Answer  Explanation 

ANSWER: 5 mV

Explanation:
No explanation is available for this question!


7)   If the power level of an amplifier reduces to half, the db gain will fall by___________?

a. 5 db
b. 2 db
c. 10 db
d. 3 db
Answer  Explanation 

ANSWER: 3 db

Explanation:
No explanation is available for this question!


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

a. RC coupling
b. Transformer coupling
c. Direct coupling
d. None of the above
Answer  Explanation 

ANSWER: RC coupling

Explanation:
No explanation is available for this question!


9)   A gain of 1,000,000 times in power is expressed by_____________?

a. 30 db
b. 60 db
c. 120 db
d. 600 db
Answer  Explanation 

ANSWER: 60 db

Explanation:
No explanation is available for this question!


10)   In transistor amplifiers, we use_____________transformer for impedance matching?

a. Step up
b. Step down
c. Same turn ratio
d. None of the above
Answer  Explanation 

ANSWER: Step down

Explanation:
No explanation is available for this question!