Last Answer : Discrimination between main and back up protection is provided by the use of relays which are slow.
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Mar 20, 2018
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anonymous

What is thermal runaway of a transistor?
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Mar 10, 2018
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anonymous

What is meant by stabilization in transistor?
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Mar 10, 2018
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anonymous

What is self biasing of transistor?
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Mar 10, 2018
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anonymous

Why biasing is required for a transistor?
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Mar 10, 2018
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anonymous

What is role of HFE in transistor ?
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Aug 21, 2019
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anonymous
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Compare P.N.P and N.P.N transistor.
Last Answer : Parameter PNP transistor NPN transistor Definition Two blocks of p- types semiconductors are separated by one thin block of n-type semiconductor. Transistor in which two ntype layer ... Positive Voltage Emitter Terminal Collector Terminal Ground Signal High Low
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Aug 19, 2019
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anonymous

Draw construction of SCR using two transistor model. Explain its operation.
Last Answer : Two Transistor Model of SCR or Thyristor
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Jul 25, 2019
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anonymous

Draw the V-I characteristics of power transistor.
Last Answer : V-I characteristics of power transistor:
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Jul 25, 2019
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anonymous
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Describe thermal runaway of transistor and explain how it can be avoided.
Last Answer : Concept of thermal runaway: 1.We know that IC = β IB + (1+ β) ICO Where ICO is the leakage current and ICO is strongly dependent on temperature. 2. Leakage current approximately doubles for ... Thermal runaway can be avoided by : 1) Using stabilization circuitry 2) Heat sink
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Jul 24, 2019
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anonymous

Define α and β of the transistor.
Last Answer : α: The ratio of collector current IC to emitter current IE for a constant collector to base voltage VCB in the CB configuration is called current gain alpha (α). β : The ratio of collector ... a constant collector to emitter voltage VCE in the CE configuration is called current gain beta (β) .
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Jul 24, 2019
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anonymous

List various transistor biasing methods.
Last Answer : Types of biasing methods: i. Base bias (or fixed bias) ii. Base bias with emitter feedback. iii. Base bias with collector feedback iv. Voltage divider bias (or self bias) v. Emitter bias.
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Jul 24, 2019
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anonymous

Transistor operating configurations
Last Answer : Transistor operating configurations
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May 20, 2019
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anonymous

Define junction field effect transistor (JFET) and give an example.
Last Answer : Junction Field-Effect Transistor: It is a semiconductor device having three terminals, namely Gate, Drain and Source, in which the current flow is controlled by an electric field set up by an external voltage applied ... : i) n-channel JFET and ii) p-channel JFET Examples of JFET: BFW 10, BFW 11
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Sep 5, 2018
by
anonymous

Explain working of n-p-n transistor in unbiased condition.
Last Answer : Construction of NPN transistor: For an unbiased transistor no external power supplies are connected to it. Base is sandwiched between collector & emitter terminal. It is thin & lightly doped ... providing external power supply to transistor & this process is known as Biasing.
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Sep 5, 2018
by
anonymous

Define α & β and derive the relation between (α) &) (β) of transistor.
Last Answer : α : The ratio of output collector current IC to input emitter current IE in the CB configuration is called current gain alpha (α). β : The ratio of output collector current IC to the input base current IB in the CE configuration is ... ( 1/β) + 1 hence 1/ α = (1+β )/ β Therefore, α = β /(1+β)
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Sep 5, 2018
by
anonymous

Define biasing of transistor
Last Answer : Biasing of transistor is the process that makes the base emitter junction of transistor always forward biased and collector junction reverse biased for achieving the faithful amplification .
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Sep 5, 2018
by
anonymous

With neat diagram explain working of NPN transistor.
Last Answer : N-p-n transistor is made by sandwiching thin layer of p-type semiconductor between two layers of n-type semiconductor. It has three terminals - Emitter, Base and collector. The npn transistor has two ... up in the collector as it is more positive. In this way, current flows in the transistor.
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854 views
2 answers
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Sep 5, 2018
by
anonymous

Draw and explain self-basing of a transistor.
Last Answer : Transistor Biasing is the process of setting a transistors DC operating voltage or current conditions to the correct level so that any AC input signal can be amplified correctly by the transistor. ExplanationIt ... Applying KVL to o/p loop , Collector-emitter voltage, VCE = VCC − IC RC
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Sep 5, 2018
by
anonymous

Compare between CB , CE & CC transistor configuration.
Last Answer : Parameter CB CE CC I/P impedance Low Or 50Ω Medium Or 600Ωto 4kΩ High Or 1 MΩ Current Gain Less than or equal to 1 High Highest Voltage Gain Medium Medium Less ... k Ω to 50 k Ω Low Or 50 Ω Phase shift between input and output 0° 360° 0°
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Sep 4, 2018
by
anonymous

Why transistor is called as bipolar device.
Last Answer : BJT is called bipolar device because in BJT current conduction takes place due to majority as well as minority charge carriers that is because of electrons as well as holes.
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Sep 4, 2018
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anonymous

101 views
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Mar 22, 2018
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anonymous

527 views
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Mar 22, 2018
by
anonymous

What do you mean by biasing of a transistor?
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Mar 22, 2018
by
anonymous

List the main parts of D.C. motor
Last Answer : Main parts of D.C. motor and their functions: Part Functions Yoke i) Provides mechanical support for poles. ii) Acts as protecting cover for machine. iii) Carries magnetic flux. ... a fixed physical position relative to the stator. Shaft Used to transfer mechanical power
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Apr 27, 2020
by
anonymous

What are the main electrical equipment used in HPS ? State the function of each parts of it in brief.
Last Answer : Following Main Electrical Equipment used in HPS & their function: 1. Alternator 2. Exciter 3. Transformer 4. Switchgear Function : 1) Alternator:- Alternator is coupled to ... part from the healthy section. It contains circuit breaker, relays, switches and other control devices.
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Aug 2, 2019
by
anonymous

List out main components of Diesel power station.
Last Answer : Main components of Diesel power station: 1) Diesel Engine 2) Engine Air intake system 3) Engine Fuel System 4) Engine Exhaust system 5) Engine cooling system 6) Engine Lubricating system 7) Engine Starting system 8) Diesel Engine Generator (Alternator)
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Aug 2, 2019
by
anonymous

List out main components of Reactors.
Last Answer : List the main components of Reactors: 1. Core 2. Nuclear fuel (U235) 3. Moderator 4. Control Rod 5. Reflector 6. Reactor vessel 7. Shielding
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Aug 2, 2019
by
anonymous

How rating of main switch and cable is selected for Industrial Installation.
Last Answer : 1. Rating of Main Switch or Fuse Rating is decided in industrial installation: Rating of main switch or fuse is based up the starting current of motor. For calculating starting current is considered 2 ... take 1.5 times the rated current or full load current. & thus cable rating is decided.
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327 views
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Sep 20, 2018
by
anonymous

The main advantage of AC over DC is: (A) Conversion flexibility from one voltage level to other (B) AC can be easily converted into DC by using a rectifier (C) AC is easy to maintain & can be easily distributed at long distances (D) All of the above
Last Answer : Ac is easy to maintain and ac can be easily converted to dc by rectifier .There is no commutator for conversion in ac that's why ac machines are weight less and more efficiency.ac machines occupy less space than dc .
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143 views
2 answers
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May 8, 2018
by
anonymous

The main objectives in framing tariff are: (A) The consumers must readily understand the tariffs (B) The tariff must be equitable amongst different consumers (C) Tariffs can be modified from time to time (D) All of the above
Last Answer : The main objectives in framing tariff are: (A) The consumers must readily understand the tariffs (B) The tariff must be equitable amongst different consumers (C) Tariffs can be modified from time to time (D) All of the above
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108 views
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May 8, 2018
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anonymous

Last Answer : In main line service as compared to urban and suburban service distance between the stops is more, maximum speed reached is high, acceleration and retardation rates are low.
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Mar 22, 2018
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anonymous

Last Answer : In split phase motor main winding is of thick wire placed at the bottom of the slots.
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Mar 20, 2018
by
anonymous

Last Answer : The main function of a fuse is to prevent excessive currents.
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Mar 19, 2018
by
anonymous

What is the main disadvantage of phase advancers?
Last Answer : It cannot be used for motors below 20 H.P.
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Mar 19, 2018
by
anonymous

What is the main purpose of electroplating?
Last Answer : Protecting reactive metals from corrosion.
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Mar 11, 2018
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anonymous

What are the main causes of harmonics?
Last Answer : Harmonic is a non linear load because linear load voltage deviated due to connection of some electrinie device such as converter,inverter
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177 views
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Mar 10, 2018
by
anonymous

What are the main parts of a generator?
Last Answer : the main parts of the generator are as follows yoke Armature Poles field winding Prime mover Commutator Shaft Bearings Brushes
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Dec 16, 2017
by
anonymous

Difference between MOSFET and FET
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What is the basic use of capacitor?
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Mar 15, 2018
by
anonymous

What is the use of stability factor?
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Mar 10, 2018
by
anonymous

How Household Use Electricity And Energy
Last Answer : I have often wondered what the average use of energy of appliances is. Here is a breakdown by percentage usage of each consuming appliance taken from a sampling of US households. Refrigerators 13.7% ... Telephone 0.2 Rechargeable Tools 0.2 Humidifier 0.1 Automobile Block Heater 0.0 Residual 7.3
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How To Make Use Of Empty Film Canisters
Last Answer : Canteen SWAP Glue two grey lids together. Blue a small strip of leather around the outside, leaving some hanging for the carrying strap'. Glue pony bead on top for screw top. Flower Vase SWAP Use ... on two small wiggle eyes. Glue the lid on at an angle so the pompom head shows peeking out.
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How To Make Use Of Household Salt
Last Answer : 1. Soak stained hankies in salt water before washing. 2. Sprinkle salt on your shelves to keep ants away. 3. Soak fish in salt water before descaling; the scales will come off easier. 4. Put a ... 't smell and will bake into a dry, light crust which will wipe off easily when the oven has cooled.
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10 Ways To Use AlkaSeltzer
Last Answer : Clean a toilet Drop in two Alka-Seltzer tablets, wait twenty minutes, brush, and flush. The citric acid and effervescent action clean vitreous china. Clean a vase To remove a stain from the bottom of a ... mosquitos flock to it, drop dead and fall into the water or on the floor within about 10 ft.
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10 Unusual Ways to Use a Dishwasher
Last Answer : You may already know that dishwashers use less energy than hand-washing dishes, but did you know that they can be used for an assortment of other tasks, as well? Even if your dishwasher no longer functions for ... home? What do you do with it to make it earn its keep? Tell us in the comments below!
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How to Use the Secret
Last Answer : How to Use the Secret You've heard it before on the radio, talk shows and over lunch: the Secret. What is it? Learn about the life-changing plan to get positive energy and change ... others and contribute to spreading positive energy. It will help create a cycle of continuous giving and receiving.
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How to Use Punctuation
Last Answer : How to Use Punctuation Perfect English may seem intimidating to some people, but the proper punctuation marks are often all that stand between a good piece and a bad one. Whether you're writing a ... you need to brush up on your grammar skills and practice writing every day to get them right.
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How to Use Proper Grammar
Last Answer : How to Use Proper Grammar A common notion in grammar is that if it sounds good or looks good, then it must be good. There's a difference between grammar that's OK, and grammar that's proper ... these tips, you can land the perfect impression on your readers with a perfect, solid use of grammar.
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