List two common usages of magnetic amplifiers

List two common usages of magnetic amplifiers
by

1 Answer

Answer :

Servosystems, temperature recorders, or power supplies
by

Related questions

What are the main usages and size of storage of a tablet computer?

Description : What are the main usages and size of storage of a tablet computer?

Last Answer : Tablet computers (or simply 'Tablets') are the newest in computing technology and come in many varieties. The uses for tablets are as numerous as the uses for laptops. Work, email and social networking are among ... space, ranging from 32gb (gigabyte) all the way up to (and beyond) 1 tb (terabyte).

What is a database trigger ? Name some usages of database trigger ?

Description : What is a database trigger ? Name some usages of database trigger ?

Last Answer : Database trigger is stored PL/SQL program unit associated with a specific database table. Usages are Audit data modifications, Log events transparently, Enforce complex business rules Derive column values automatically, Implement complex security authorizations. Maintain replicate tables.

In what two ways are amplifiers classified?

Description : In what two ways are amplifiers classified?

Last Answer : By function and frequency response.

What is the primary difference between the NPN and PNP amplifiers?

Description : What is the primary difference between the NPN and PNP amplifiers?

Last Answer : The polarity of the source voltage

The IF amplifiers are connected in what amplifier configuration?

Description : The IF amplifiers are connected in what amplifier configuration?

Last Answer : Cascade.

Why do electronic devices use amplifiers?

Description : Why do electronic devices use amplifiers?

Last Answer : To amplify the input signal to a usable level.

List the applications of Log amplifiers:

Description : List the applications of Log amplifiers:

Last Answer : 1.Analog computation may require functions such as lnx, log x, sin hx etc. These functions can be performed by log amplifiers 2.Log amplifier can perform direct dB display on digital voltmeter and spectrum analyzer 3.Log amplifier can be used to compress the dynamic range of a signal

Common basic applications for the operational amplifier include ____________. A. counting, pulsing and clocking amplifiers B. summing, scaling and difference amplifiers C. step-up, step-down and rectifying amplifiers D. all of the above

Description : Common basic applications for the operational amplifier include ____________. A. counting, pulsing and clocking amplifiers B. summing, scaling and difference amplifiers C. step-up, step-down and rectifying amplifiers D. all of the above

Last Answer : Answer: B

List four factors that can degrade the frequency response of magnetic tape recorders.

Description : List four factors that can degrade the frequency response of magnetic tape recorders.

Last Answer : a. A too-high or too-low bias signal level setting for the record head. b. An improper reproduce head gap. c. An improper tape transport speed. d. Poor tape-to-head contact.

List four rules you should follow when storing magnetic tape to protect it from damage.

Description : List four rules you should follow when storing magnetic tape to protect it from damage.

Last Answer : a. Make sure the tape is wound properly on the reel hub, b. store tapes vertically, c. keep storage area at right temperature and humidity, d. store away from equipment that generates stray magnetic fields.

List the two common types of waveguides in use today.

Description : List the two common types of waveguides in use today.

Last Answer : Cylindrical and rectangular.

List the circuits that all oscilloscopes have in common.

Description : List the circuits that all oscilloscopes have in common.

Last Answer : A CRT, a group of control circuits, power supply, sweep circuitry, and deflection circuitry.

List five common fiber optic transmitter packages.

Description : List five common fiber optic transmitter packages.

Last Answer : TO can, DIP, butterfly lead microcircuits, circuit cards, and stand-alone optical fiber converters.

Two non -inverting amplifiers, one having a unity gain and the other having again of twenty are made using

Description : Two non -inverting amplifiers, one having a unity gain and the other having again of twenty are made using identical operational amplifiers. As compared to the unity gain amplifier, the amplifier with gain twenty has

Last Answer : Two non -inverting amplifiers, one having a unity gain and the other having again of twenty are made using identical operational amplifiers. As compared to the unity gain amplifier, the amplifier with gain twenty has less bandwidth

Is it possible to bridge an odd number of amplifiers?

Description : Is it possible to bridge an odd number of amplifiers?

Last Answer : No. That's not possible. Amplifiers can only be bridged in pairs, and pairs of pairs, etc. And if they're not identical amps, you're asking for trouble, too. Some stereo amplifiers are wired so that you ... 4-channel, and he's bridging them in some odd way to create a balanced pair of pair of amps.

What are antenna amplifiers used for?

Description : What are antenna amplifiers used for?

Last Answer : Antenna amplifiers are used to strengthen the signal being supplied to an appliance such as your TV. Amplifiers are necessary when the signal is weak and interferes with your TV reception.

Can I get government assistance if I am deaf and need phone amplifiers?

Description : Can I get government assistance if I am deaf and need phone amplifiers?

Last Answer : Some states do have assistance available-- Nevada and Nebraska are two examples. Help from the Federal Government directly is not available through Medicare or the National Institute on Deafness and Other ... do have a directory of local groups that will help-- www.nidcd.nih.gov/directory/

Are phone amplifiers bad for your hearing?

Description : Are phone amplifiers bad for your hearing?

Last Answer : They can be bad for your hearing if they are putting out more than 105 dB. 10 minutes of noise at 105 dB can damage your hearing. Though minor damage can be repaired by itself, repeatedly getting minor damage adds up to major damage and hearing loss.

Are car amplifiers just about volume, or do they improve sound quality, as well?

Description : Are car amplifiers just about volume, or do they improve sound quality, as well?

Last Answer : Cap amplifiers can provide an enhanced audio experience as they often are able to reproduce a wider range of audio frequencies compared to many stock car stereos.

Does the volume go to "11" on any car amplifiers?

Description : Does the volume go to "11" on any car amplifiers?

Last Answer : No. Police can pull you over for noise pollution so they tend not to make them do higher.

Which car amplifiers work best with MP3 files?

Description : Which car amplifiers work best with MP3 files?

Last Answer : Pioneer is the best amplifer and car system that works with MP3 files.

Are the amplifiers easy to remove?

Description : Are the amplifiers easy to remove?

Last Answer : Yes it's easy to remove amplifiers from your car. First make sure the fuse is out of the power wire , so the wire is not live. Then disconnect the wires from your amp. Then unscrew the amp from where it's mounted.

Are there special amplifiers for hybrid and electric vehicles?

Description : Are there special amplifiers for hybrid and electric vehicles?

Last Answer : Yes, they draw power differently as to not kill the engine.

Negative feedback in amplifiers – (1) increases bandwidth and decreases noise (2) decreases bandwidth and decreases noise (3) increases bandwidth and in-creases noise (4) decreases bandwidth and increases noise

Description : Negative feedback in amplifiers – (1) increases bandwidth and decreases noise (2) decreases bandwidth and decreases noise (3) increases bandwidth and in-creases noise (4) decreases bandwidth and increases noise

Last Answer : (1) increases bandwidth and decreases noise Explanation: Voltage gain, input impedance, output impedance, bandwidth etc. are few important characteristics of an amplifier. These parameters are more or ... be controlled. This can be conveniently achieved by employing a technique, called the feedback.

Negative feedback in amplifiers – (1) increases bandwidth and decreases noise (2) decreases bandwidth and decreases noise (3) increases bandwidth and in-creases noise (4) decreases bandwidth and increases noise

Description : Negative feedback in amplifiers – (1) increases bandwidth and decreases noise (2) decreases bandwidth and decreases noise (3) increases bandwidth and in-creases noise (4) decreases bandwidth and increases noise

Last Answer : (1) increases bandwidth and decreases noise Explanation: Voltage gain, input impedance, output impedance, bandwidth etc. are few important characteristics of an amplifier. These parameters are more or ... be controlled. This can be conveniently achieved by employing a technique, called the feedback.

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

The conversion of the throttle command voltage to the signal necessary to achieve the desired shaft RPM is accomplished by the _____________. A. ahead or astern function generator of the throttle control circuit B. feedback resistor of the summing amplifier circuit C. operational amplifiers in the autorotation circuit D. long time constant amplifier circuit

Description : The conversion of the throttle command voltage to the signal necessary to achieve the desired shaft RPM is accomplished by the _____________. A. ahead or astern function generator of the ... circuit C. operational amplifiers in the autorotation circuit D. long time constant amplifier circuit

Last Answer : Answer: A

Since the characteristics of the device shown in figure 'A' of the illustration includes a stable voltage and low current while operating, it can be suitably used in _____________. EL-0065 A. oscillators and SCR trigger circuits B. class A and B amplifiers C. generator rectifier and filtering supplies D. all of the above

Description : Since the characteristics of the device shown in figure 'A' of the illustration includes a stable voltage and low current while operating, it can be suitably used in _____________. EL-0065 A. oscillators ... . class A and B amplifiers C. generator rectifier and filtering supplies D. all of the above

Last Answer : Answer: A

Indicate the false statement. A. HF mixer are generally noisier than HF amplifiers. B. Impulse noise voltage is dependent on bandwidth C. Thermal noise is independent of the frequency at which is measured. D. Industrial noise is usually of the impulse type.

Description : Indicate the false statement. A. HF mixer are generally noisier than HF amplifiers. B. Impulse noise voltage is dependent on bandwidth C. Thermal noise is independent of the frequency at which is measured. D. Industrial noise is usually of the impulse type.

Last Answer : B. Impulse noise voltage is dependent on bandwidth

Why are frequency modulation transmitters more efficient? A. Because their power is increased by class C amplifiers B. Because their power is increased by class A amplifiers C. Because their power is increased by class B amplifiers D. Because their power is increased by class AB amplifiers

Description : Why are frequency modulation transmitters more efficient? A. Because their power is increased by class C amplifiers B. Because their power is increased by class A amplifiers C. Because their power is increased by class B amplifiers D. Because their power is increased by class AB amplifiers

Last Answer : A. Because their power is increased by class C amplifiers

In a triple conversion superheterodyne receiver, diode mixer stages are operated A. In the linear region B. In the nonlinear region C. As class A amplifiers D. As class B amplifiers

Description : In a triple conversion superheterodyne receiver, diode mixer stages are operated A. In the linear region B. In the nonlinear region C. As class A amplifiers D. As class B amplifiers

Last Answer : B. In the nonlinear region

If you have available number of power amplifiers with a gain of 100 each, how many such amplifiers do you need to cascade to give an overall gain of 60 dB? A. 3 B. 4 C. 5 D. 2

Description : If you have available number of power amplifiers with a gain of 100 each, how many such amplifiers do you need to cascade to give an overall gain of 60 dB? A. 3 B. 4 C. 5 D. 2

Last Answer : A. 3

What are feed back amplifiers?

Description : What are feed back amplifiers?

Last Answer : Amplifiers which uses feed back principle is called as feed back amplifiers.

How are amplifiers classified according to the transistor configuration?

Description : How are amplifiers classified according to the transistor configuration?

Last Answer : 1. Common emitter amplifier 2. Common base amplifier 3. Common collector amplifier

How are amplifiers classified according to the input?

Description : How are amplifiers classified according to the input?

Last Answer : 1. Small – signal amplifier 2. Large – signal amplifier

………………... are needed to communicate with systems on other networks.A. repeaters B. amplifiers C. Bridge D. Gateways

Description : ………………... are needed to communicate with systems on other networks. A. repeaters B. amplifiers C. Bridge D. Gateways

Last Answer : D. Gateways

Which of the following contributes to harmonics distortion in amplifiers? A) Positive feedback B) Presence of noise C) Defective active device D) Non linearity in active device.

Description : Which of the following contributes to harmonics distortion in amplifiers? A) Positive feedback B) Presence of noise C) Defective active device D) Non linearity in active device.

Last Answer : D) Non linearity in active device.

Optical amplifiers use a ____________________ laser.

Description : Optical amplifiers use a ____________________ laser.

Last Answer : pump

Optical amplifiers use ____________________-doped glass.

Description : Optical amplifiers use ____________________-doped glass.

Last Answer : erbium

Negative feedback in amplifiers (1) increases bandwidth and decreases noise (2) decreases bandwidth and decreases noise (3) increases bandwidth and increases noise (4) decreases bandwidth and increases noise

Description : Negative feedback in amplifiers (1) increases bandwidth and decreases noise (2) decreases bandwidth and decreases noise (3) increases bandwidth and increases noise (4) decreases bandwidth and increases noise

Last Answer :  increases bandwidth and decreases noise

Compare Class A ,Class B, Class C and class AB power amplifiers on the basis of: i)Angle of conduction ii)Efficiency iii)Position of operating pointing power dissipation iv)Distortion

Description : Compare Class A ,Class B, Class C and class AB power amplifiers on the basis of: i)Angle of conduction ii)Efficiency iii)Position of operating pointing power dissipation iv)Distortion

Last Answer : Compare Class A ,Class B, Class C and class AB power amplifiers on the basis of: i)Angle of conduction ii)Efficiency iii)Position of operating pointing power dissipation iv)Distortion

State classification of Amplifiers.

Description : State classification of Amplifiers.

Last Answer : CLASSIFICATION OF AMPLIFIERS: A] Based on input signal 1. Small signal amplifiers 2. Large signal amplifiers B] Based on output signal 1. Voltage amplifier 2. Power amplifier C ... coupling 1. Direct coupled amplifiers 2. R-C Coupled amplifier 3. Transformer coupled amplifier

Comment on the effect of negative feedback on the gain, input and output resistance of the feedback amplifiers.Describe the gain bandwidth product term used in this context and its importance.

Description : Comment on the effect of negative feedback on the gain, input and output resistance of the feedback amplifiers.Describe the gain bandwidth product term used in this context and its importance.

Last Answer : Effect of negative feedback: 1. Gain decreases with negative feedback. 2. Input resistance increases with negative feedback. 3. Output resistance decreases with negative feedback. Explanation ... feedback bandwidth increases which means it is stable output on more range of frequency.

Classify the power amplifiers on the basis of operation and input/output waveforms.

Description : Classify the power amplifiers on the basis of operation and input/output waveforms.

Last Answer : Depending upon the operation and input/output waveforms power amplifiers are classified into following type. 1) Class A amplifier. 2) Class B amplifier. 3) Class C amplifier. 4) Class AB amplifier. 5) Class D amplifier

different types of feedback amplifiers

Description : different types of feedback amplifiers

Last Answer : Types of feedback amplifiers: 1. Positive feedback amplifiers 2. Negative feedback amplifiers (i)voltage series feedback amplifiers (ii)voltage shunt feedback amplifiers (iii)current series feedback amplifiers (iv)current shunt feedback amplifiers

Define each of following terms of operational amplifiers i) Slew rate ii) Input offset voltage iii) Voltage gain iv) Input capacitance

Description : Define each of following terms of operational amplifiers i) Slew rate ii) Input offset voltage iii) Voltage gain iv) Input capacitance

Last Answer : i) Slew rate:- Maximum rate of change of o/p voltage per unit of time. It is express in volt/µsec.  ii) Input offset voltage:- The voltage that must be applied between two ... capacitance that can be measured at either be inverting or non-inverting terminal with other terminal connected to ground.

The amplifiers following the modulated stage in a low level modulation AM system be

Description : The amplifiers following the modulated stage in a low level modulation AM system be  (A) linear amplifier (B) harmonic generators (C) class C power amplifiers (D) class untuned amplifiers

Last Answer : The amplifiers following the modulated stage in a low level modulation AM system be class C power amplifiers

Cross over distortion in class - B push-p amplifiers:

Description : Cross over distortion in class - B push-p amplifiers:  1. Is due to transistor operating near saturation region  2. Can be eliminated by operating them in class operation  3. Occurs because two power transistors do not exactly matching parameters  4. Always occurs in low signal area

Last Answer : Cross over distortion in class - B push-p amplifiers:  1. Is due to transistor operating near saturation region  2. Can be eliminated by operating them in class operation  3. Occurs because two power transistors do not exactly matching parameters  4. Always occurs in low signal area

If three amplifiers having the same bandwidth are cascaded, the bandwidth of the resulting amplifier will be

Description : If three amplifiers having the same bandwidth are cascaded, the bandwidth of the resulting amplifier will be (a) Better than that of each stage (b) Worse than that of each stage (c) Same as that of each stage (d) None of the above 

Last Answer : If three amplifiers having the same bandwidth are cascaded, the bandwidth of the resulting amplifier will be Worse than that of each stage