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What is meant by distortion in amplifiers?

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Answer : Transformer coupled amplifiers Direct coupled amplifiers Multistage amplifiers Darlington amplifiers Emmiter follower

Description : How does negative feedback reduces distortion in an amplifier?

Description : The second harmonic distortion is defined as the A) Ratio of amplitude of second harmonic component in the output to that of the fundamental frequency B) Harmonic distortion due to only second harmonic component C) Sum of distortion of first and second harmonic components in the output 

Answer : The second harmonic distortion is defined as the Ratio of amplitude of second harmonic component in the output to that of the fundamental frequency

Description : Transformer coupling introduces which type of distortion?

Answer : Transformer coupling introduces Cross over distortion.

Description : What is the use of operational amplifiers?

Description : different types of feedback amplifiers

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

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

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

Description : working of distortion factor meter with block diagram

Answer : Working : Initially the switch S is kept at position 1.The attenuator gets excluded and the bridge T network is adjusted for full suppression of fundamental frequency and hence we get ... is obtained on the meter.Thus the total rms distortion is indicated by the reading of attenuator. 

Description : The effect of negative feedback on distortion and bandwidth is A) Both distortion and bandwidth get decreased B) Both distortion and bandwidth get increased C) Distortion is reduced and bandwidth is increased D) Distortion is increased and bandwidth is decreased 

Answer : The effect of negative feedback on distortion and bandwidth is Distortion is reduced and bandwidth is increased

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

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

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

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

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

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

Description : What is meant by stabilization in transistor?

Description : Bandwidth of an RC coupled amplifier is 100 kHz. Two such amplifiers are connected in cascade.Resultant bandwidth(in kHz) is around  A) 200 B) 100 C) 60 D) 30

Answer : Negative feed back reduces Distortion in amplifiers 

Answer : In all base driver amplifiers ac collector voltage is 180° out of phase with ac base voltage.

Answer : Negative feedback is used in audio amplifiers to Reduce distortion.

Answer : Amplifiers are coupled to Increase gain

Answer : If three stage amplifiers has individual stage gain of 10 db, 5 db & 12 db then the total gain 27 db

Answer : Tuned amplifiers are used for Radio frequency amplification

Description : A circuit is said to be free from phase distortion if its phase response shows: (1) Quadrature variation with frequency (2) Independent of frequency (3) Linear variation with frequency (4) Proportional to frequency

Answer : A circuit is said to be free from phase distortion if its phase response shows: Proportional to frequency

Description : Maximum phase distortion is encountered when using the filter approximation  A) Elliptic B) Butterworth C) Chebyshev I D) Inverse Chebyshev

Answer : Which type of fading causes serious distortion of modulated signal: Selective fading.

Description : What is meant by surface ignition in SI engine? 

Answer : Surface ignition: Surface ignition is the ignition of the fuel-air mixture by a hot spot on the combustion chamber walls such as on overheated valve or spark plug or glowing combustion Chamber ... and start propagates across the chamber in an analogous manner to what occurs in normal knock.

Description : What is meant by 5'S'? Explain each 'S' in details

Answer : 5 S' Concept:- 5'S is the name of a workplace organization methodology that uses a list of five Japanese words which are seiri, seiton, seiso, seiketsu and shitsuke constitute the system. ... Eliminate unwanted items. ➢ Maintain the discipline at work place ➢ Improved safety

Description : What is meant by grade contour? How it will be located in field? 

Answer : It is the contour established on a specific grade or gradient along the hill side. OR The line joining the points of equal grade or gradient is termed as grade contour. Procedure for ... all the marked points will give us the required grade contour of 1 in 30 accurately. 

Description : What is meant by ‘Capital Gain’ ? (1) Part of profits added to the capital (2) Appreciation in the money value of assets (3) Additions to the capital invested in a business (4) None of these

Answer : Appreciation in the money value of assets

Description : What is meant by the term “midnight sun” ? (1) Twilight (2) Rising Sun (3) Very bright moon (4) Sun shining in the polar circle for long time

Answer : Sun shining in the polar circle for long time

Description : What is meant by pinch off voltage in MOSFET?

Description : What is meant by body effect in MOSFET?

Description : What is meant by feedback in electronics?

Description : What is meant by feeder in power system?

Answer : A feeder line is a peripheral route or branch in a network which connects smaller or more remote nodes with a route or branch carrying heavier traffic. The term is applicable to any system based on a hierarchical network.

Description : What is meant by belief network?

Answer : A belief network is a graph in which the following holds  A set of random variables  A set of directive links or arrows connects pairs of nodes.  The conditional probability table for each node  The graph has no directed cycl

Description : What is meant by Turing test?

Answer : To conduct this test we need two people and one machine. One person will be an interrogator (i.e.) questioner, will be asking questions to one person and one machine. Three of them will be ... Interrogator, the machine acts like a human. Programming a computer to pass Turing test is very difficult.

Description : What is meant by Monosiphonous and Polysiphonous pollen grains? Give examples. 

Answer : Ans: Pollen gains that form single pollen tube are monosiphonous. Ex: Solanum. Which form more than one pollen tubes are Polysiphonous. Ex: Malvaceae, Cucurbitaceae 

Description : What is meant by unit membrane and what is its approximate thickness? 

Answer : Ans: Any biological membrane with bimolecular lipid zone surrounded by monomolecular protein zones is called as unit membrane by Robertson. Its thickness is 75A0 .  

Description : What is meant by apposition and intussusception? 

Answer : Ans: Apposition is increase in thickness of the cell wall due to deposition of cellulose fibrils one upon the other to form the frame work. Intussusception is increase in the area of the cell wall due to deposition of non-cellulose cell wall materials between cellulose fibrils. 

Description : What is meant by closing error? How will you adjusted graphically?

Answer : Closing error : While plotting compass traverse, when first and last survey line does not coincides by some amount of distance, that distance is called as closing error. Adjustment ... . Finally join new points to get corrected traverse ABCDEA after graphical adjustment of closing error.

Description : What is meant by profile leveling and cross-sectioning ?

Answer : profile leveling : To know the nature of the ground surface the profile leveling is done along the Centre of the road at some regular intervals if required, staff readings may also be taken at points ... surface transverse to the Centre of the road. The length depend upon the nature of the work.

Description : What is meant by local attraction? How will you suspect local attraction at the field ? state its effect on included angle.

Answer : Local attraction: It is the deviation or deflection of magnetic needle from its normal position under influence of external magnetic forces is called as local attraction. Suspect of local attraction ... The needle is affected by local attraction therefore it does not give a corrected angle

Description : What is meant by orientation? Explain orientation by back sighting method

Answer : Orientation: The method of setting up the plane table at each of the successive stations parallel to the position it occupied at the starting station is known as orientation. Orientation by back sighting: ... ranging rod at A are perfect, then the orientation is said to be perfect.  

Description : What is meant by closing error? Explain graphical method of adjustment of closing error.

Answer : Closing error: The distance by which the traverse fails to close is called closing error. Step 1 ) Draw a horizontal line AA1 Equal to the length of perimeter of the traverse to a suitable scale 1) Mark ... 6) Join the the new points which gives the closed traversed. A, B, C,D and A.

Description : What is meant by sedimentary environment? give an account on Continental sedimentary environment.

Description : What is meant by geologic cycle? State the types of weathering and explain brief.

Answer : Geologic cycle: The most important of these begins with molten magma from within the earth crystallizing into rock then continues with the rock being broken down into soil and that soil then being ... the break down and decay of rock indeed their part in soil formation is of major significance

Description : What is meant by zero circle? State the advantages of digital planimeter over polar planimeter.

Answer : Zero circle:- When the tracing point is moved along a circle without rotation of the wheel i.e. when the wheel slides without any change in reading ,the circle is known as the zero circle or ... are required for area. 3) It gives more accurate reading 4) Less time required for measurement

Description : What is meant by the statement that an animal is oviparous?  

Answer : ANSWER: IT LAYS EGGS

Description : What is meant by permanent adjustment of a theodolite.Enlist any two such adjustment.

Answer : A theodolite consist of several fundamental lines .In order reading to be accurate, certain desired relationship must exist between the fundamental lines of the instruments. But due to improper handling or ... axix 4 Adjustment of level tube on the telescope 5 Adjustment of vertical index frame.

Description : The problem for the research related to metaphysics can be Options: A) What is meant by existence B) What are the qualities of the existence of the objects C) How knowledge of individuality of the objects can be realised D) All the above

Answer : D) All the above 

Description : When a definition implies a proposal to use the definiendum to mean what is meant by the definiens it is called (A) Lexical definition (B) Stipulative definition (C) Precising definition (D) Persuasive definition

Answer : (B) Stipulative definition

Description : What is meant by Isthmus? (1) Mouth of a river where it joins the sea (2) Narrow strip of water dividing two land masses (3) Narrow strip of land dividing two oceans (4) Narrow strip of land connecting two large areas of land

Answer : Narrow strip of land dividing two oceans

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