The voltage gain of a common base amplifier depends on

The voltage gain of a common base amplifier depends on 

1. Load resistor RL 2. input resistance of transistor 3. Ac alpha 4. All the above 
by

1 Answer

Answer :

The voltage gain of a common base amplifier depends on 

1. Load resistor RL 2. input resistance of transistor 3. Ac alpha 4. All the above 

by

Related questions

An amplifier without feedback has a voltage gain of 50, input resistance 1kΩ and output resistance of 2.5kΩ.

Description : An amplifier without feedback has a voltage gain of 50, input resistance 1kΩ and output resistance of 2.5kΩ. The input resistance of the current-shunt negative feedback amplifier using the above amplifier with a feedback factor of 0.2 would be: (1) 1/11 kΩ (2) 1/5 kΩ (3) 5 kΩ (4) 11 kΩ

Last Answer : An amplifier without feedback has a voltage gain of 50, input resistance 1kΩ and output resistance of 2.5kΩ. The input resistance of the current-shunt negative feedback amplifier using the above amplifier with a feedback factor of 0.2 would be: 1/11 kΩ

The closed-loop voltage gain of an inverting amplifier equal to

Last Answer : The closed-loop voltage gain of an inverting amplifier equal to The feedback resistance divided by the input resistance.

The voltage gain of a common -source JFET amplifier depends up on its

Description : The voltage gain of a common -source JFET amplifier depends up on its  (1) Input impedance (2) Amplification factor (3) Dynamic drain resistance (4) Drain load resistance

Last Answer : B

The unity gain bandwidth of an inverting amplifier is 10 MHz What would be the bandwidth if the gain is

Description : The unity gain bandwidth of an inverting amplifier is 10 MHz What would be the bandwidth if the gain is increased to 10 V/V? A) 100 MHz B) 1 MHz C) 10 MHz D) 1 kHz 

Last Answer : The unity gain bandwidth of an inverting amplifier is 10 MHz What would be the bandwidth if the gain is increased to 10 V/V? A) 100 MHz B) 1 MHz C) 10 MHz D) 1 kHz 

The gain of an FET amplifier can be changed by changing:

Description : The gain of an FET amplifier can be changed by changing: (1) rm (2) gm (3) Rd (4) None of these

Last Answer : The gain of an FET amplifier can be changed by changing: gm

If the feedback factor of an amplifier is 0.1 and its gain without feedback is 40, then its gain with feedback is

Description : If the feedback factor of an amplifier is 0.1 and its gain without feedback is 40, then its gain with feedback is (a) – 13.3 (b) 200 (c) 8 (d) 10 

Last Answer : If the Feedback Factor of an amplifier is 0.1 and its gain without feedback is 40, then feedback is 40,then its gain with feedback is 8.

For a feedback amplifier, if the loop gain is much greater than unity, the closed loop gain will be equal to

Description : For a feedback amplifier, if the loop gain is much greater than unity, the closed loop gain will be equal to

Last Answer : For a feedback amplifier, if the loop gain is much greater than unity, the closed loop gain will be equal to inverse of feedback factor

An amplifier without feedback has a gain of 1000. The gain with a negative feedback of 0.009 is

Description : An amplifier without feedback has a gain of 1000. The gain with a negative feedback of 0.009 is  A) 10 B) 100 C) 125 D) 900

Last Answer : 100

An operational amplifier has an open loop gain of 200,000. Its output exhibits saturation at 10V.

Description : An operational amplifier has an open loop gain of 200,000. Its output exhibits saturation at 10V. The threshold differential voltage of the amplifier is  A) 25 micro-volt B) 50 micro-volt C) 5 Volts D) 10 volts

Last Answer : An operational amplifier has an open loop gain of 200,000. Its output exhibits saturation at 10V. The threshold differential voltage of the amplifier is 50 micro-volt

The main component responsible for the fall of gain of an RC coupled amplifier in low frequency

Description : The main component responsible for the fall of gain of an RC coupled amplifier in low frequency range is  (A) The active device itself (tube, or transistor)  (B) stray shunt capacitance Cs  (C) the grid leak resistance Rg  (D) coupling capacitor Cc

Last Answer : The main component responsible for the fall of gain of an RC coupled amplifier in low frequency range is coupling capacitor Cc

In a Klystron amplifier, the RF voltage produces

Description : In a Klystron amplifier, the RF voltage produces  (a) amplitude modulation (b) frequency modulation (c) phase modulation (d) velocity modulation

Last Answer : In a Klystron amplifier, the RF voltage produces velocity modulation

Just as a voltage amplifier signal voltage a power amplifier.

Description : Just as a voltage amplifier signal voltage a power amplifier.  1.amplifier power  2.amplifier signal  3.converts the signal ac power into DC power  4.converts a dc power into useful AC power 

Last Answer : Just as a voltage amplifier signal voltage a power amplifier.  1.amplifier power  2.amplifier signal  3.converts the signal ac power into DC power  4.converts a dc power into useful AC power 

An Op-amp as a voltage follower has a voltage gain of

Description : An Op-amp as a voltage follower has a voltage gain of

Last Answer : An Op-amp as a voltage follower has a voltage gain of Unity

A certain common-emitter amplifier has a voltage gain of 100. If the emitter bypass capacitor is removed.

Description : A certain common-emitter amplifier has a voltage gain of 100. If the emitter bypass capacitor is removed.  a. The circuit will become unstable b. The voltage gain will decrease  c. The voltage gain will increase d. The circuit will become stable

Last Answer : B

In a differential amplifier the differential voltage gain is 500 and the common mode voltage gain is 0.5. ...

Description : In a differential amplifier the differential voltage gain is 500 and the common mode voltage gain is 0.5. The CMRR in dB is (a) 80 (b) 60 (c) 30 (d) 20

Last Answer : Ad - differential voltage gain. Acm- common mode voltage gain CMRR - common mode rejection ratio  CMRR = 20log(Ad/Acm) = 60 dB

The ideal operational amplifier does not have:

Description : The ideal operational amplifier does not have: (1) Infinite input resistance (2) Infinite output resistance (3) Infinite voltage gain (4) Infinite bandwidth 

Last Answer : The ideal operational amplifier does not have: Infinite output resistance

A low noise amplifier has an effective noise temperature of 50 k. The absolute noise figure is

Description : A low noise amplifier has an effective noise temperature of 50 k. The absolute noise figure is

Last Answer : A low noise amplifier has an effective noise temperature of 50 k. The absolute noise figure is 1.172

An amplifier operating over the frequency range from 18 to 20 MHz has 10 kilo ohm input resistor. What is

Description : An amplifier operating over the frequency range from 18 to 20 MHz has 10 kilo ohm input resistor. What is the r.m.s. noise voltage at the input to this amplifier if the ambient temperature is 27o C

Last Answer : An amplifier operating over the frequency range from 18 to 20 MHz has 10 kilo ohm input resistor. What is the r.m.s. noise voltage at the input to this amplifier if the ambient temperature is 27o C 18.2 microvolt

For Cascode amplifier the output impedance becomes

Description : For Cascode amplifier the output impedance becomes 

Last Answer : For Cascode amplifier the output impedance becomes very high

In a radio receiver the IF amplifier

Description : In a radio receiver the IF amplifier  (A) is tuned above the stations incoming frequency (B) amplifies the output of local oscillator (C) is fixed tuned to one particular frequency (D) can be tuned to various isolate frequencies

Last Answer : In a radio receiver the IF amplifier is fixed tuned to one particular frequency

Class A amplifier is used when

Description : Class A amplifier is used when  (A) No phase inversion is required (B) Highest voltage gain is required (C) dc voltages are to be amplified (D) Minimum distortion is desired. 

Last Answer : Class A amplifier is used when Minimum distortion is desired. 

Negative feedback amplifier has a signal corrupted by noise as its input. The amplifier will

Description : Negative feedback amplifier has a signal corrupted by noise as its input. The amplifier will   (A) Amplify the noise as much as the signal (B) Reduce the noise (C) Increase the noise (D) Not effect the noise

Last Answer : Negative feedback amplifier has a signal corrupted by noise as its input. The amplifier will Reduce the noise

In an IF amplifier, the IF transformer is provided with tapping to

Description : In an IF amplifier, the IF transformer is provided with tapping to  (a) increase the voltage gain (b) increase the bandwidth of the resonance circuit (c) increase the impedance ... resonance circuit to the following cascaded amplifier (d) increase the quality factor of the resonance circuit 

Last Answer : In an IF amplifier, the IF transformer is provided with tapping to increase the voltage gain

In class - A power amplifier, the collector dissipation is maximum when

Description : In class - A power amplifier, the collector dissipation is maximum when  (a) no signal is present  (b) signal swing is maximum  (c) signal swing is (1/1.414) of its maximum  (d) none of the above

Last Answer : In class - A power amplifier, the collector dissipation is maximum when no signal is present

In Class ‘B’ amplifier, the output current flows for

Description : In Class ‘B’ amplifier, the output current flows for

Last Answer : In Class ‘B’ amplifier, the output current flows for half input cycle

The efficiency of a class B push-pull amplifier is

Description : The efficiency of a class B push-pull amplifier is

Last Answer : The efficiency of a class B push-pull amplifier is 75-80%

Which of the following amplifier has the least distortion.

Description : Which of the following amplifier has the least distortion. • Class E • Class D • Class C • Class A

Last Answer : Which of the following amplifier has the least distortion. • Class E • Class D • Class C • Class A

The battery operated pre-amplifier with a consumption of 10 Watts can work on battery of 12

Description : The battery operated pre-amplifier with a consumption of 10 Watts can work on battery of 12 volt, 100 AH having efficiency of 50% for • 120 hrs. • 60 hrs. • 100 hrs. • 10 hrs.

Last Answer : The battery operated pre-amplifier with a consumption of 10 Watts can work on battery of 12 volt, 100 AH having efficiency of 50% for 60 hrs.

In class-A amplifier conduction extends over 360° because the operating point.

Description : In class-A amplifier conduction extends over 360° because the operating point.  1. Located near saturation point 2. Located at or near cut-off point 3. Located on load line 4. Located in the centre of load line 

Last Answer : In class-A amplifier conduction extends over 360° because the operating point.  1. Located near saturation point 2. Located at or near cut-off point 3. Located on load line 4. Located in the centre of load line 

Harmonic distortion of the signal is produced in an RC coupled transistor amplifier. The probable

Description : Harmonic distortion of the signal is produced in an RC coupled transistor amplifier. The probable component responsible for this distortion is  (A) The transistor itself  (B) the power supply Vcc  (C) the coupling capacitor Cc  (D) the biasing resistors

Last Answer : Harmonic distortion of the signal is produced in an RC coupled transistor amplifier. The probable component responsible for this distortion is The transistor itself 

The main function of the transformer used in the output of a power amplifier is

Description : The main function of the transformer used in the output of a power amplifier is  (A) To step up the voltage  (B) to increase the voltage gain  (C) to safeguard the transistor against overheating  (D) to match the load impedance with dynamic output resistance of the transistor

Last Answer : The main function of the transformer used in the output of a power amplifier is to match the load impedance with dynamic output resistance of the transistor

Negative feedback in an amplifier is accompanied by

Description : Negative feedback in an amplifier is accompanied by (A) Gain less sensitive to component variations (B) Increase in gain (C) Decrease in bandwidth (D) None of the above

Last Answer : Negative feedback in an amplifier is accompanied by Gain less sensitive to component variations 

What is the importance of negative feedback in the operational amplifier?

Description : What is the importance of negative feedback in the operational amplifier? (A) It maintains the gain (B) The voltage difference between the input terminals is maintained at a very small value ( ... value (D) The voltage difference between the input terminals is maintained at a very high value

Last Answer : The voltage difference between the input terminals is maintained at a very small value

Which amplifier will be preferred for highest gain? A) Darlington's pair B) Cascade amplifier C) Cascode amplifier D) Depends on the circuitry

Description : Which amplifier will be preferred for highest gain? A) Darlington's pair B) Cascade amplifier C) Cascode amplifier D) Depends on the circuitry

Last Answer : C) Cascode amplifier

In the ideal closed loop operational amplifier, the gain depends on

Description : In the ideal closed loop operational amplifier, the gain depends on (A) value of the series component (B) value of the feedback component (C) on the operational amplifier itself (D) both A and B

Last Answer : In the ideal closed loop operational amplifier, the gain depends on (A) value of the series component (B) value of the feedback component (C) on the operational amplifier itself (D) both A and B

A non inverting closed loop op amp circuit generally has a gain factor

Last Answer : A non inverting closed loop op amp circuit generally has a gain factor Greater than one.

Compare BJT common base configuration with common collector configuration on the basis of (i) Current gain (ii) Voltage gain (iii) Input impedance (iv) Output impedance

Description : Compare BJT common base configuration with common collector configuration on the basis of (i) Current gain (ii) Voltage gain (iii) Input impedance (iv) Output impedance

Last Answer : Parameter Common Base Common Collector Current gain Low (About 1) High (1+β) Voltage gain High 1  Input impedance  Low High Output impedance High Low

When troubleshooting an amplifier, you measure an output of 30 volts. If the gain of the amplifier is 2, what must the input voltage be for the amplifier to work properly? A. 32 volts B. 30 volts C. 28 volts D. 15 volts

Description : When troubleshooting an amplifier, you measure an output of 30 volts. If the gain of the amplifier is 2, what must the input voltage be for the amplifier to work properly? A. 32 volts B. 30 volts C. 28 volts D. 15 volts

Last Answer : Answer: D

The first stage of a two-stage amplifier has a voltage gain of 10, a 600 Ω input resistor, a 1600Ω equivalent noise resistance and 27kΩ output resistor. For the second stage, these values are 25, 81kΩ, 19kΩ, and 1MΩ, respectively. Calculate the equivalent input-noise resistance of this two stage amplifier. A. 2,518 kΩ B. 2,518 Ω C. 251.8 Ω D. 12,518 Ω

Description : The first stage of a two-stage amplifier has a voltage gain of 10, a 600 Ω input resistor, a 1600Ω equivalent noise resistance and 27kΩ output resistor. For the second stage, these values are 25, 81kΩ, 19kΩ, and 1MΩ, ... this two stage amplifier. A. 2,518 kΩ B. 2,518 Ω C. 251.8 Ω D. 12,518 Ω

Last Answer : B. 2,518 Ω

Define the term related to power amplifier. (i) Efficiency (ii) Voltage gain

Description : Define the term related to power amplifier. (i) Efficiency (ii) Voltage gain

Last Answer : (i) Efficiency: Efficiency of the power amplifier is defined as the ratio of maximum a.c. output power to the d.c. input power. Mathematically (ii) Voltage gain: Voltage gain of the power amplifier is defined as the ratio of output voltage to the input voltage. Mathematically,

An amplifier has a voltage gain of 120. To reduce distortion, 10% negative feedback is employed. The gain of

Description : An amplifier has a voltage gain of 120. To reduce distortion, 10% negative feedback is employed. The gain of the amplifier with feedback is  (1) 141 (2) 92.3 (3) 9.23 (4) 1.41

Last Answer : An amplifier has a voltage gain of 120. To reduce distortion, 10% negative feedback is employed. The gain of the amplifier with feedback is 9.23

An amplifier has a voltage gain of 50; this gain in dB will be

Description : An amplifier has a voltage gain of 50; this gain in dB will be (A) 34 dB (B) 68 dB (C) 41 dB (D) 14 dB 

Last Answer : An amplifier has a voltage gain of 50; this gain in dB will be 34 dB

A differential amplifier has a differential gain of 28000 and CMRR is 60 dB. What will be the value of common

Description : A differential amplifier has a differential gain of 28000 and CMRR is 60 dB. What will be the value of common mode gain? A) Ac = 0.125 B) Ac = 0.33 C) Ac = 3 D) Ac = 28 

Last Answer : A differential amplifier has a differential gain of 28000 and CMRR is 60 dB. What will be the value of common mode gain? A) Ac = 0.125 B) Ac = 0.33 C) Ac = 3 D) Ac = 28 

A differential amplifier has a differential gain of 20,000, CMRR : 80 dB. The common mode gain is given by

Description : A differential amplifier has a differential gain of 20,000, CMRR : 80 dB. The common mode gain is given by

Last Answer : A differential amplifier has a differential gain of 20,000, CMRR : 80 dB. The common mode gain is given by 2

The voltage gain of triode depends on?

Last Answer : The voltage gain of triode depends on plate voltage.

The diagram shown in the illustartion represents a/an _____________. EL-0022 A. magnectic amplifier B. common base amplifier C. common collector amplifier D. common emitter amplifier

Description : The diagram shown in the illustartion represents a/an _____________. EL-0022 A. magnectic amplifier B. common base amplifier C. common collector amplifier D. common emitter amplifier

Last Answer : Answer: D

In the illustrated circuit, the amplifier is connected in what basic configuration? EL-0022 A. common base B. reverse bias, negative feedback C. common emitter D. common collector

Description : In the illustrated circuit, the amplifier is connected in what basic configuration? EL-0022 A. common base B. reverse bias, negative feedback C. common emitter D. common collector

Last Answer : Answer: C

In the illustrated circuit, the amplifier is connected in what basic configuration? EL-0045 A. common emitter B. common collector C. darlington paired, capacitor coupled D. common base

Description : In the illustrated circuit, the amplifier is connected in what basic configuration? EL-0045 A. common emitter B. common collector C. darlington paired, capacitor coupled D. common base

Last Answer : Answer: D

In op-amp operation, Common Mode Rejection Ratio (CMRR)

Description : In op-amp operation, Common Mode Rejection Ratio (CMRR)

Last Answer : In op-amp operation, Common Mode Rejection Ratio (CMRR) is desired to be high

In the illustration, the component VR2 on the A1 AMPLIFIER MODULE is _________. EL-0060 A. a zener diode to regulate the +9 volt power supply from common B. a variable resistor diode to control the output to terminal 1 that controls the input to terminal 10 C. a zener diode that regulates the voltage to terminal 2 at 9.1 volts DC D. a tunnel diode with a breakdown voltage of 6.6 Volts DC

Description : In the illustration, the component VR2 on the A1 AMPLIFIER MODULE is _________. EL-0060 A. a zener diode to regulate the +9 volt power supply from common B. a variable resistor diode to control the output to terminal ... 2 at 9.1 volts DC D. a tunnel diode with a breakdown voltage of 6.6 Volts DC

Last Answer : Answer: C