The units of voltage gain is

It has no units, it is a ratiob) Decibels (d

Which of the following isn’t true?

Both transformer and amplifier can provide voltage gain

Both transformer and amplifier can provide current gain

Both transformer and amplifier can provide power gain

Statement 1: Voltage gain of -5 means that the output voltage has been attenuated. Statement 2: Voltage gain of -5db means that the output voltage has been attenuated.

Statement 1 and Statement 2 are true

Statement 1 and Statement 2 are false

What is meant by stability of the an amplified signal?

The input and the output signal must be proportional

The amplified signal must have a finite amplitude

The amplified signal should not have self oscillation

The input and the output signal must be proportional

The ratio of the input and the output signal must be finite

Which of the following isn‚Äö√Ñ√∂‚àö√ë‚àö¬•t true?$

Both transformer and amplifier can provide voltage gain

Both transformer and amplifier can provide current gain

Both transformer and amplifier can provide power gain

In order to prevent distortion in the output signal after amplification, the input signal must be

Both higher than the positive saturation level of the amplifier and lower than the negative saturation level of the amplifier

Higher than the positive saturation level of the amplifier

Lower than the negative saturation level of the amplifier

Must lie with the negative and the positive saturation level of the amplifier

Both higher than the positive saturation level of the amplifier and lower than the negative saturation level of the amplifier

15 + Mcqs in Amplifiers in Electronic Devices Circuits Page 1 McqOptions

1.	The units of voltage gain is
A.	It has no units, it is a ratiob) Decibels (d
B.	Decibels (db)
C.	All of the mentioned
D.	None of the mentioned
Answer» B. Decibels (db)

Discussion

2.	An amplifier has a voltage gain of 100 V/V and a current gain of 1000A/A. the value of the power gain decibel is
A.	30 db
B.	40 db
C.	50 db
D.	60 db
Answer» D. 60 db

Discussion

3.	If Av, Ai and Ap represents the voltage gain, current gain and power gain ratio of an amplifier which of the below is not the correct expression for the corresponding values in decibel?
A.	Current gain: 20 log Ai db
B.	Voltage gain: 20 log Av db
C.	Power gain: 20 log Ap db
D.	Power gain: 10 log Ap
Answer» D. Power gain: 10 log Ap

Discussion

4.	Which of the following isn’t true?
A.	Both transformer and amplifier can provide voltage gain
B.	Both transformer and amplifier can provide current gain
C.	Both transformer and amplifier can provide power gain
D.	None of the mentioned
Answer» D. None of the mentioned

Discussion

5.	Statement 1: Voltage gain of -5 means that the output voltage has been attenuated. Statement 2: Voltage gain of -5db means that the output voltage has been attenuated.
A.	Statement 1 and Statement 2 are true
B.	Statement 1 and Statement 2 are false
C.	Only Statement 1 is true
D.	Only Statement 2 is true
Answer» E.

Discussion

6.	An amplifier operating from ±3V provide a 2.2V peak sine wave across a 100 ohm load when provided with a 0.2V peak sine wave as an input from which 1.0mA current is drawn. The average current in each supply is measured to be 20mA. What is the amplifier efficiency?
A.	20.2%
B.	25.2%
C.	30.2%
D.	35.2%
Answer» B. 25.2%

Discussion

7.	AN_AMPLIFIER_HAS_A_VOLTAGE_GAIN_OF_100_V/V_AND_A_CURRENT_GAIN_OF_1000A/A._THE_VALUE_OF_THE_POWER_GAIN_DECIBEL_IS?$
A.	30 db
B.	40 db
C.	50 db
D.	60 db
Answer» D. 60 db

Discussion

8.	The_units_of_voltage_gain_is$
A.	It has no units, it is a ratio
B.	Decibels (db)
C.	All of the mentioned
D.	None of the mentioned
Answer» B. Decibels (db)

Discussion

9.	If A_v, A_i and A_p represents the voltage gain, current gain and power gain ratio of an amplifier which of the below is not the correct expression for the corresponding values in decibel?
A.	Current gain: 20 log A<sub>i</sub> db
B.	Voltage gain: 20 log A<sub>v</sub> db
C.	Power gain: 20 log A<sub>p</sub> db
D.	Power gain: 10 log A<sub>p</sub>
Answer» D. Power gain: 10 log A<sub>p</sub>

Discussion

10.	What is meant by stability of the an amplified signal?
A.	The amplified signal must have a finite amplitude
B.	The amplified signal should not have self oscillation
C.	The input and the output signal must be proportional
D.	The ratio of the input and the output signal must be finite
Answer» C. The input and the output signal must be proportional

Discussion

11.	Symmetrically saturated amplifiers operating in clipping mode can be used to convert a sine wave to a
A.	Square wave
B.	Pseudo Square wave
C.	Sawtooth wave
D.	Triangular wave
Answer» C. Sawtooth wave

Discussion

12.	Which of the following isn‚Äö√Ñ√∂‚àö√ë‚àö¬•t true?$
A.	Both transformer and amplifier can provide voltage gain
B.	Both transformer and amplifier can provide current gain
C.	Both transformer and amplifier can provide power gain
D.	None of the mentioned
Answer» D. None of the mentioned

Discussion

13.	The voltage gain of the amplifier is 8 and the current gain is 7. The power gain of the amplifier is
A.	56 db
B.	17.481 db
C.	34.963 db
D.	1 db
Answer» C. 34.963 db

Discussion

14.	In order to prevent distortion in the output signal after amplification, the input signal must be
A.	Higher than the positive saturation level of the amplifier
B.	Lower than the negative saturation level of the amplifier
C.	Must lie with the negative and the positive saturation level of the amplifier
D.	Both higher than the positive saturation level of the amplifier and lower than the negative saturation level of the amplifier
Answer» D. Both higher than the positive saturation level of the amplifier and lower than the negative saturation level of the amplifier

Discussion

15.	An amplifier operating from ¬¨¬®¬¨¬±3V provide a 2.2V peak sine wave across a 100 ohm load when provided with a 0.2V peak sine wave as an input from which 1.0mA current is drawn. The average current in each supply is measured to be 20mA. What is the amplifier efficiency?
A.	20.2%
B.	25.2%
C.	30.2%
D.	35.2%
Answer» B. 25.2%

Discussion

Explore topic-wise MCQs in Electronic Devices Circuits.

The units of voltage gain is

An amplifier has a voltage gain of 100 V/V and a current gain of 1000A/A. the value of the power gain decibel is

If Av, Ai and Ap represents the voltage gain, current gain and power gain ratio of an amplifier which of the below is not the correct expression for the corresponding values in decibel?

Which of the following isn’t true?

Statement 1: Voltage gain of -5 means that the output voltage has been attenuated. Statement 2: Voltage gain of -5db means that the output voltage has been attenuated.

An amplifier operating from ±3V provide a 2.2V peak sine wave across a 100 ohm load when provided with a 0.2V peak sine wave as an input from which 1.0mA current is drawn. The average current in each supply is measured to be 20mA. What is the amplifier efficiency?

AN_AMPLIFIER_HAS_A_VOLTAGE_GAIN_OF_100_V/V_AND_A_CURRENT_GAIN_OF_1000A/A._THE_VALUE_OF_THE_POWER_GAIN_DECIBEL_IS?$

The_units_of_voltage_gain_is$

If Av, Ai and Ap represents the voltage gain, current gain and power gain ratio of an amplifier which of the below is not the correct expression for the corresponding values in decibel?

What is meant by stability of the an amplified signal?

Symmetrically saturated amplifiers operating in clipping mode can be used to convert a sine wave to a

Which of the following isn‚Äö√Ñ√∂‚àö√ë‚àö¬•t true?$

The voltage gain of the amplifier is 8 and the current gain is 7. The power gain of the amplifier is

In order to prevent distortion in the output signal after amplification, the input signal must be

An amplifier operating from ¬¨¬®¬¨¬±3V provide a 2.2V peak sine wave across a 100 ohm load when provided with a 0.2V peak sine wave as an input from which 1.0mA current is drawn. The average current in each supply is measured to be 20mA. What is the amplifier efficiency?

If A_v, A_i and A_p represents the voltage gain, current gain and power gain ratio of an amplifier which of the below is not the correct expression for the corresponding values in decibel?