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
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
Last Answer : Transformer coupled amplifiers Direct coupled amplifiers Multistage amplifiers Darlington amplifiers Emmiter follower
Description : Compare positive and negative feedback.
Last Answer : Sr. No. Parameter Positive feedback Negative feedback 1 BW Increases Decreases 2 Feedback signal In phase with the input signal. 180 º out of phase ... impedance increases decreases 9 Uses Oscillators, Schmitt trigger Amplifiers, bootstrapping
Description : advantages of negative feedback over positive feedback.
Last Answer : Advantages of negative feedback over positive feedback: 1. Higher fidelity i.e. more linear operation. 2. Highly stabilized gain. 3. Increased bandwidth i.e. improved frequency response. 4. Less ... . 8. Input and output impedance can be modified as desired. 9. Less frequency distortion.
Description : Write advantages and disadvantages of positive and negative feedback.
Last Answer : Advantages of Positive Feedback: i) Voltage gain increases. ii) No phase shift is provided. iii) Feedback signal and input signal are in phase. iv) Input and Output voltage increases. ... ii) Feedback signal and input signal are out of phase. iii) Input and Output voltage decreases.
Description : Differentiate between positive and negative feedback.
Last Answer : PARAMETER POSITIVE FEEDBACK NEGATIVE FEEDBACK Overall phase shift 0° or 360° 180° Feedback and input signal Are in phase Are out of phase Input signal ... Increases Input impedance Decreases Increases Output impedance Increases Decreases
Description : Define negative and positive feedback
Last Answer : 1. Negative feedback: Feedback in which feedback signal is out of phase with input signal and it decreases output is called negative feedback. 2. Positive feedback: Feedback in which feedback signal is in phase with input signal and it increases output is called positive feedback.
Description : Have you seen my website? Would you give me some feedback?
Last Answer : It appears I’m using Internet Explorer and your website made my computer freeze. I had to open Task Manager and end the program to get back up and running.
Description : What do you do to find trustworthy feedback?
Last Answer : Look them in the eye in a confident way and say “Don’t lie to me. Be honest.” Usually works for me.
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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
Last Answer : The effect of negative feedback on distortion and bandwidth is Distortion is reduced and bandwidth is increased
Description : Given a unity feedback system with G(s)=k/s (s+4), the value of k for damping ratio of 0.5 is
Last Answer : Given a unity feedback system with G(s)=k/s (s+4), the value of k for damping ratio of 0.5 is 16
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
Description : A unity negative feedback control system is found to have a gain margin of 20 dB. The Nyquist plot of the system (A) crosses the real axis at +0.1 (B) crosses the real axis at -0.1. (C) crosses the imaginary axis at -0.1 (D) crosses the imaginary axis at +0.1
Last Answer : A unity negative feedback control system is found to have a gain margin of 20 dB. The Nyquist plot of the system crosses the real axis at -0.1.
Description : Negative feedback in a closed-loop control system DOES NOT (A) reduce the overall gain (B) reduce bandwidth (C) improve disturbance rejection (D) reduce sensitivity to parameter variation
Last Answer : Negative feedback in a closed-loop control system DOES NOT reduce bandwidth
Description : State different types of holders used in wiring installation.
Last Answer : Following types of holders used in wiring installation: 1. Pendent Holder 2. Batten Holder 3. Angle holder 4. Screwed holder
Description : List the different types of frequency meters.
Last Answer : Different types of frequency meters 1. Reed type [Mechanical type] 2. Ferro-dynamic type [Resonances type] 3. Weston type 4. Ratio-meter type 5. Saturable core type 6. Digital type
Description : List different types of FET.
Last Answer : Types of FETs: 1. Junction FET (JFET) i. N-Channel JFET ii. P-Channel JFET 2. MOSFET i. E-MOSFET ii. D-MOSFET
Description : what are the three different types of Electric power?
Last Answer : Real,reactive,apparent power
Description : Define earthing. State its types.
Last Answer : Definition of earthing: * Earthing means connecting the metal body of electrical device to the general mass of earth by a wire of negligible resistance. OR * Earthing means connecting the metal body of ... ii) Pipe type earthing iii) Rod type earthing iv) Strip earthing v)Water main earthing
Description : State the types of protections provided by MCB.
Last Answer : The types of protections provided by MCB: 1. MCB provides short circuit protection. 2. MCB provides overload protection
Description : State the types of wind turbines.
Last Answer : The types of Wind Turbines:- 1) Vertical axis wind turbine (VAWT) 2) Horizontal axis wind turbine (HAWT) i) Up wind HAWT ii) Down Wind HAWT OR The types of wind turbines:- 1. Small size wind turbine 2. Medium size wind turbine 3. Large size wind turbine
Description : State various types of errors in wattmeter.
Last Answer : Types of Error in wattmeter: 1. Errors due to method of connection. 2. Error due to pressure coil inductance. 3. Error due to pressure coil Capacitance. 4. Error due to mutual inductance effect. 5. ... . Error due to eddy currents. 7. Temperature error. 8. Error due to vibration of moving system.
Description : List two types of oscillator, which generates frequency in RF range.
Last Answer : Types of Oscillators generating frequencies in RF range: i) Hartley Oscillator ii) Colpitt’s Oscillator iii) Clapp Oscillator
Description : State any four types of capacitors.
Last Answer : Types of capacitors: i) Air capacitor ii) Paper capacitor iii) Mica capacitor iv) Ceramic capacitor v) Electrolytic capacitor vi) Poly-carbon capacitor
Description : State two types of inductors and give their applications.
Last Answer : Types of inductors: i) Air cored inductor ii) Iron cored inductor iii) Ferrite cored inductor Air cored inductor: These are used for high frequency application e.g. Radio sets ... radio receiver, wide band pulse transformers, oscillators, signal generators, high frequency amplifiers, etc.
Description : List the different types of tariff.
Last Answer : Various types of Tariff:- 1) Flat-demand Tariff 2) Simple-demand Tariff or Uniform Tariff 3) Flat-rate Tariff 4) Step-rate Tariff 5) Block-rate Tariff 6) Two-part Tariff 7) Maximum demand Tariff ... c) KW and KVAR Tariff 10) TOD (Time of Day) Tariff 11) TOU ( Time of Usage) Tariff
Description : State the different types of outdoor flood lighting and where are they used.
Last Answer : There are three types of projectors used for flood lighting : a) Narrow beam Projector b) Medium angle Projector c) Wide angle Projector a) Narrow beam Projectors: - Light beam with such ... yards, stadiums, car parking area etc. 3) It is used for illuminating advertisements, boarding's etc.
Description : State the purpose of lighting control. List the different types of dimmer.
Last Answer : Purpose of Lighting Control:- 1. To turn ON or OFF the lamps 2. For dimming: The dimming control permits the adjustment of lighting over a range. 3. For changing the lighting levels ... operated dimmer 6) Triac operated Dimmer 7) PWM (Pulse width modulation) Controlled technique.
Description : State different types of electrical signal and draw all types of waveforms.
Last Answer : Types of electrical signals 1) Sine wave 2) Triangular wave 3) Square wave Waveforms
Description : Give different types of IC.
Last Answer : 1. Analog IC 2. Digital IC 3. Thin and thick film ICs 4. Monolithic ICs 5. Hybrid or multichip ICs
Description : List different types of stepper motor. State one application of stepper motor.
Last Answer : Types of stepper motor : (i)Variable - reluctance motor (ii) Permanent- magnet motors (iii) Hybrid motors. Applications of stepper motor : In robotics, In CNC machines, In computers, printers, ... In Watches, In biomedical applications such as X-ray machines, CT scan, In Process control systems.
Description : different types of errors occurs in measurement.
Last Answer : Generally errors are classified into three types: systematic errors, random errors and blunders. 1) Gross Errors 2) Random Errors 3) Systematic Errors Instrumental Errors Environmental ... to wrong observations or reading in the instruments particularly in case of energy meter reading.
Description : What are the different types of capacitors?
Last Answer : (b) is facilitated by telomerase
Description : Suggestion: Could responses to questions be given a time stamp?
Last Answer : I really love this idea and have often wondered why there was no time stamp. (I do realize that I didn’t answer your question though!)
Description : Suggestion: Could ask-public incorporate a captcha code when signing up?
Last Answer : Good idea except there is no development work being done for ask-public. The founders have moved on to other ventures.
Description : What do you think about customer service people telling you to give them all excellents on surveys?
Last Answer : The car dealerships take those surveys seriously. Anything less than an excellent is considered bad. It really does suck. Guys can get fired over it. They also effect the dealers standing with the ... review is a negative. I always give them excellent a unless they do something especially bad.
Description : I am looking for a sweet-tasting cigarillo!
Last Answer : Swisher Sweets should work for you
Description : Can you describe how other "jellies" might view yourself by using words they might use?
Last Answer : Looking grass self.
Description : Do you find it easier to praise or criticise?
Last Answer : Praise. After two children, three grandchildren, one great grandchild and countless dogs, I have learned that all the above respond more favorably to praise, rather that being critical.
Description : Types of Fire Extinguishers? Use of Fire Extinguisher ?
Last Answer : Ans. CO2 Type Fire Extinguishers, DCP type Fire Extinguishers Used for extinguishing fires of (1) Solid fires (2) Liquid fires (3) Gasfires(4)Electric
Description : Wiring – types
Last Answer : Ans) a. Casing & Capping b. Concealed wiring c. Cleat Wiring d. Conduit Wiring – Cutting of wall.
Description : Enlist the types of shapers.
Last Answer : Types of shapers: Based on the type of driving mechanism: a) Crank type shaper. b) Geared type shaper. Based on ram travel: a) Horizontal shaper. b) Vertical shaper. Based on the table design: a ... shaper. b) Universal shaper. Based on cutting stroke. a) Push cut type. b) Draw cut type.
Description : List the types of filters.
Last Answer : Types of filter are as follows: 1. Shunt Capacitor filter (C filter) 2. Series Inductor filter (L filter) 3. LC filter 4. π filter (CLC filter)
Description : Types of rolling mills and its applications
Last Answer : Types of rolling mills and its applications (1) Two-high rolling mill: used in blooming and slabbing mills (2) Three-high rolling mill: used for making plates or sections. (3) Four- ... : This mill is used for rolling stainless steel and other high strength steel sheets of thin gauge.
Description : Types of slotting machine
Last Answer : 1. Puncher slotter 2. Precision slotter 3. Production slotter Working Principle of Slotting machine:- The slotting machine is a reciprocating machine tool in which, The vertical slide holding the cutting ... longitudinal and cross feeds, a rotary feed motion is also provided in the work table.
Description : List types of chips produced in machining process.
Last Answer : The various types of chips produced in machining process are as follows: 1. Continuous chips: According to its name, continuous chips have a continuous segment. . 2. Discontinuous chips or segmental chips: ... chip is same as the continuous chips except a built edge is form at the face of tool.
Description : List types of timers.
Last Answer : Types of Timers: Retentive Timers: 1. ON Delay 2. OFF Delay Non Retentive Timers: 1. ON Delay 2. OFF Delay
Description : State two types of Electronic dimmer.
Last Answer : Two types of electronic dimmers are: 1) S.C.R. operated dimmer 2) Triac operated dimmer
Description : Define Multivibrator. State the types of multivibrator. Which M/V can be used as a flip-flop? Draw the circuit diagram.
Last Answer : Definition:- A multivibrator is an electronic circuit that switches rapidly by means of positive feedback between two or more states. OR A multivibrator is an electronic circuit used to implement a ... Bistable Multivibrator: it can operate as a flip-flop, Circuit diagram