Among the three configuration the highest output impedance is obtained by

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Answer :

Among the three configuration, the highest output impedance is obtained by CB.

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Identify type of BJT configuration having following features : (i) BJT configuration having the least current gain. (ii) KIT configuration called as voltage follower. (iii) BJT configuration having current gain less than one. (iv) BJT configuration suitable for impedance matching. (v) BIT configuration suitable for voltage amplification. (vi) BJT configuration having the least output impedance.

Description : Identify type of BJT configuration having following features : (i) BJT configuration having the least current gain. (ii) KIT configuration called as voltage follower. (iii) BJT ... configuration suitable for voltage amplification. (vi) BJT configuration having the least output impedance.  

Last Answer : (i) BJT configuration having the least current gain : Common Base Configuration  (ii) KIT configuration called as voltage follower: Common Collector Configuration  (iii) BJT ... Emitter Configuration  (vi) BJT configuration having the least output impedance: Common Collector Configuration

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

The transistor configuration to connect 4 W speaker with 600 W output impedance audio

Description : The transistor configuration to connect 4 W speaker with 600 W output impedance audio amplifier is • Common Emitter • Common Base • Common Collector • None of the above.

Last Answer : The transistor configuration to connect 4 W speaker with 600 W output impedance audio amplifier is Common Collector

For highest power gain, what configuration is used:

Description : For highest power gain, what configuration is used: (1) CC (2) CE (3) CB (4) CS

Last Answer : For highest power gain, what configuration is used: (1) CC (2) CE (3) CB (4) CS

Common base configuration is little used because A) It has low input impedance B) It has high input impedance C) It does not heat up D) It has very high gain.

Description : Common base configuration is little used because A) It has low input impedance B) It has high input impedance C) It does not heat up D) It has very high gain.

Last Answer : A) It has low input impedance

ECL is the fastest of all logic families. High Speed in ECL is possible because transistors are used in difference amplifier configuration, in which they are never driven into ............... (1) Race condition (2) Saturation (3) Delay (4) High impedance

Description : ECL is the fastest of all logic families. High Speed in ECL is possible because transistors are used in difference amplifier configuration, in which they are never driven into ............... (1) Race condition (2) Saturation (3) Delay (4) High impedance

Last Answer : Answer: 2  Explanation: Emitter-coupled logic (ECL) is the fastest of all logic families and therefore is used in applications where very high speed is essential. High speeds have become ... configuration, in which they are never driven into saturation and thereby the storage time is eliminated.

The lossless line of characteristics impedance 300 Ohm is terminated in a pure resistance of 200 Ohm.

Description : The lossless line of characteristics impedance 300 Ohm is terminated in a pure resistance of 200 Ohm. The value of the standing wave ratio is  (a) 1.5 (b) 0.67 (c) 1.0 (d) 1.25

Last Answer : The lossless line of characteristics impedance 300 Ohm is terminated in a pure resistance of 200 Ohm. The value of the standing wave ratio is 1.5

A loss less line of characteristic impedance Z0 is terminated in pure reactance of –jZ0 value. VSWR is

Description : A loss less line of characteristic impedance Z0 is terminated in pure reactance of –jZ0 value. VSWR is  (1) 10 (2) 2 (3) 1 (4) Infinity

Last Answer : A loss less line of characteristic impedance Z0 is terminated in pure reactance of –jZ0 value. VSWR is Infinity.

The magnitude of the open-circuit and short circuit input impedance of a transmission line are 100 ohm and...

Description : The magnitude of the open-circuit and short circuit input impedance of a transmission line are 100 ohm and 25 ohm respectively. The characteristic impedance of line is:  (1) 25 ohm (2) 50 ohm (3) 75 ohm (4) 100 ohm

Last Answer : The magnitude of the open-circuit and short circuit input impedance of a transmission line are 100 ohm and 25 ohm respectively. The characteristic impedance of line is 25 ohm.

Typical loudspeaker impedance rating is

Last Answer : Typical loudspeaker impedance rating is 8 ῼ.

In an RLC parallel circuit, the impedance at resonance is

Last Answer : In an RLC parallel circuit, the impedance at resonance is Maximum.

Intrinsic impedance of free space is given as

Last Answer : Intrinsic impedance of free space is given as 377 ῼ.

inductors have a high impedance when?

Description : inductors have a high impedance when?

Last Answer : When you increase the number of turns.

Which configuration has the lowest current gain ?

Description : Which configuration has the lowest current gain ?

Last Answer : Common base configuration has the lowest current gain.

Operational amplifiers, used primarily in analog circuits, are characterized by ____________. A. high input impedance, high gain and low output impedance B. high input impedance, high gain and high output impedance C. low input impedance, low gain and high output impedance D. low input impedance, high gain and low output impedance

Description : Operational amplifiers, used primarily in analog circuits, are characterized by ____________. A. high input impedance, high gain and low output impedance B. high input impedance, high gain and high output ... gain and high output impedance D. low input impedance, high gain and low output impedance

Last Answer : Answer: A

Not a reason for the use of an antenna coupler. A. To make the antenna look resistive B. To provide the output amplifier with the correct load impedance C. To discriminate against harmonics D. To prevent re-radiation of the local oscillator

Description : Not a reason for the use of an antenna coupler. A. To make the antenna look resistive B. To provide the output amplifier with the correct load impedance C. To discriminate against harmonics D. To prevent re-radiation of the local oscillator

Last Answer : D. To prevent re-radiation of the local oscillator

Calculated the noise figure of the amplifier whose Req equals 2518Ω (RT=600Ω) if its driven by a generator whose output impedance is 50Ω. A. 39.4 B. 3.94 C. 394 D. 0.394

Description : Calculated the noise figure of the amplifier whose Req equals 2518Ω (RT=600Ω) if its driven by a generator whose output impedance is 50Ω. A. 39.4 B. 3.94 C. 394 D. 0.394

Last Answer : A. 39.4

Termination means A. result of disconnecting a line from a transmitter B. result of cutting both ends of a conductor C. looking back impedance of a line with no load D. load connected to the output end of a transmission line

Description : Termination means A. result of disconnecting a line from a transmitter B. result of cutting both ends of a conductor C. looking back impedance of a line with no load D. load connected to the output end of a transmission line

Last Answer : D. load connected to the output end of a transmission line

Characteristics impedance of a transmission line is the impedance measured at the ___________ when its length is infinite. A. input B. shorted end of the line C. output D. midsection

Description : Characteristics impedance of a transmission line is the impedance measured at the ___________ when its length is infinite. A. input B. shorted end of the line C. output D. midsection

Last Answer : A. input

If the output impedance of an amplifier circuit is decreased, what is the effect on the gain?

Description : If the output impedance of an amplifier circuit is decreased, what is the effect on the gain?

Last Answer : The gain decreases.

What impedance relationship between the output of one circuit and the input of another circuit will provide the maximum power transfer?

Description : What impedance relationship between the output of one circuit and the input of another circuit will provide the maximum power transfer?

Last Answer : Equal impedance.

One ofthe followingis not a reason forthe use of anantenna coupler: a. To make the antenna look resistive b. To provide the output amplifier with the correct load impedance c. To discriminate against harmonics d. To prevent reradiation of the local oscillator

Description : One ofthe followingis not a reason forthe use of anantenna coupler: a. To make the antenna look resistive b. To provide the output amplifier with the correct load impedance c. To discriminate against harmonics d. To prevent reradiation of the local oscillator

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What happens to output when a tri-state circuit is selected for high impedance.

Description : What happens to output when a tri-state circuit is selected for high impedance.

Last Answer : Output is disconnected from rest of the circuits by internal circuitry.

Non-inverting amplifier circuits have _______ (a) Very high input impedance (b) very low input impedance (c) low output impedance (d) none of above

Description : Non-inverting amplifier circuits have _______ (a) Very high input impedance (b) very low input impedance (c) low output impedance (d) none of above

Last Answer : (a) Very high input impedance

For JK flipflop J = 0, K=1, the output after clock pulse will be (A) 1. (B) no change. (C) 0. (D) high impedance.

Description : For JK flipflop J = 0, K=1, the output after clock pulse will be (A) 1. (B) no change. (C) 0. (D) high impedance.

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The output of SR flip flop when S=1, R=0 is (A) 1 (B) 0 (C) No change (D) High impedance

Description : The output of SR flip flop when S=1, R=0 is (A) 1 (B) 0 (C) No change (D) High impedance

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For JK flip flop with J=1, K=0, the output after clock pulse will be (A) 0. (B) 1. (C) high impedance. (D) no change.

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A linear network has a current input 4cos(ω t + 20º)A and a voltage output 10 cos(ωt +110º) V. Determine the associated impedance.

Description : A linear network has a current input 4cos(ω t + 20º)A and a voltage output 10 cos(ωt +110º) V. Determine the associated impedance.

Last Answer : Solution

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

The advantage of using the illustrated circuit configuration is _________. EL-0045 A. high input resistance B. high current gain C. the best stability with an increase in temperature D. the input and output are 180 degrees out of phase

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Which transistor configuration provides a phase reversal between the input and output signals?

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select the correct response from the choices given in the parentheses. Q-20. In a closed-loop configuration the output signal is determined by (the input signal, the feedback signal, both).

Description : select the correct response from the choices given in the parentheses. Q-20. In a closed-loop configuration the output signal is determined by (the input signal, the feedback signal, both).

Last Answer : Both the input signal and the feedback signal.

Draw the output characteristics of BJT in CE configuration and label various regions on it.

Description : Draw the output characteristics of BJT in CE configuration and label various regions on it.

Last Answer :  output characteristics of BJT in CE configuration 

Draw the input and output characteristics of CE configuration.

Description : Draw the input and output characteristics of CE configuration.

Last Answer : Input characteristics of CE configuration: Output characteristics of CE configuration:

Sketch output characteristics of CE configuration. Show all the regions.

Description : Sketch output characteristics of CE configuration. Show all the regions.

Last Answer : Sketch output characteristics of CE configuration. Show all the regions.

Draw output characteristics of common emitter [CE] configuration and explain active, saturation and cut-off regions in detail.

Description : Draw output characteristics of common emitter [CE] configuration and explain active, saturation and cut-off regions in detail. 

Last Answer : Characteristics of common emitter [CE] configuration Explanation :  (1) Active Region: In this region collector junction is reverse biased and emitter junction is forward biased. It is ... the transistor collector current is approximately given by VCC / RC and independent of base current. 

Sketch pin configuration of IC 723. State functions of each pin. Sketch circuit diagram for obtaining 6V output d.c. regulated voltage using IC 723.

Description : Sketch pin configuration of IC 723. State functions of each pin. Sketch circuit diagram for obtaining 6V output d.c. regulated voltage using IC 723.

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Configuration Management can be administered in several ways. These include a) A single configuration management team for the whole organization b) A separate configuration management team for each project c) Configuration Management distributed among the project members d) All of the mentioned

Description : Configuration Management can be administered in several ways. These include a) A single configuration management team for the whole  organization b) A separate configuration management team for ... c) Configuration Management distributed among the project  members d) All of the mentioned

Last Answer : a) A single configuration management team for the whole  organization

From the ground state, electronic configuration of the elements given below, pick up the one with highest value of second ionization energy:

Description : From the ground state, electronic configuration of the elements given below, pick up the one with highest value of second ionization energy:

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Which transistor configuration has the highest input resistance?

Description : Which transistor configuration has the highest input resistance?

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For an earth station transmitter, with an antenna output power of 40dBW 10,000W, a back-off loss of 3dB, a

Description : For an earth station transmitter, with an antenna output power of 40dBW 10,000W, a back-off loss of 3dB, a total branching and feeder loss of 3dB, a total branching and feeder loss of 3dB and transmit ... effective isotropic radiated power (EIRP will be  a) 38dBW b) 40 dBW c 36 dBW d) 47 dBW

Last Answer : For an earth station transmitter, with an antenna output power of 40dBW 10,000W, a back-off loss of 3dB, a total branching and feeder loss of 3dB, a total branching and feeder loss of 3dB and transmit antenna gain of 4dB, the effective isotropic radiated power (EIRP will be 38dBW

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Description : The threshold effect in demodulators is a) The rapid fall of output SNR when the input SNR falls below a particular value b) Exhibited by all the demodulators when the input SNR is low c) Exhibited by all AM suppressed carrier coherent demodulators d) Exhibited by correlation receivers

Last Answer : The threshold effect in demodulators is The rapid fall of output SNR when the input SNR falls below a particular value

In a full wave rectifier with input frequency of 50 Hz, the frequency of the output is:

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The output waveform of a 555 Timer is:

Description : The output waveform of a 555 Timer is: (1) Sinusoidal (2) Triangular (3) Rectangular (4) Elliptical 

Last Answer : The output waveform of a 555 Timer is: Rectangular

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Description : Ripple in output current of a step-down chopper feeding RLE load is maximum, when duty cycle is equal to:  (1) 1 (2) 0.5 (3) 0.75 (4) 0.33

Last Answer : Ripple in output current of step down Chopper feeding a RLE load is maximum, when duty cycle is equal to 0.5

The ripple voltage in the output of a single phase half wave rectifier with 10 V rectified dc

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Last Answer : The ripple voltage in the output of a single phase half wave rectifier with 10 V rectified dc voltage with resistive load and without filter will be 12.1 volt

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Last Answer : The frequency stability of the oscillator output is maximum in Crystal oscillator. 

In a half-wave rectifier, if an a.c supply is 60 Hz. Then what is the a.c ripple at output?

Description : In a half-wave rectifier, if an a.c supply is 60 Hz. Then what is the a.c ripple at output? (A) 30 Hz (B) 60 Hz (C) 20 Hz (D) 15 Hz

Last Answer : In a half-wave rectifier, if an a.c supply is 60 Hz. Then what is the a.c ripple at output? (A) 30 Hz (B) 60 Hz (C) 20 Hz (D) 15 Hz

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Description : In computer system Scanner is _________device. A. Input B. Output C. Both D. None 

Last Answer : In computer system Scanner is Input device.