asked
Mar 22, 2018
by
anonymous
Description : What is thermal runaway of a transistor?
asked
Mar 10, 2018
by
anonymous
Description : What is the main use of a transistor?
Answer :
Main use of a transistor as amplifier and as switch.
asked
Mar 10, 2018
by
anonymous
Description : What is self biasing of transistor?
asked
Mar 10, 2018
by
anonymous
Description : What do you mean by biasing of a transistor?
asked
Mar 22, 2018
by
anonymous
Description : Why biasing is required for a transistor?
asked
Mar 10, 2018
by
anonymous
Description : What is role of HFE in transistor ?
asked
Aug 21, 2019
by
anonymous
Description : Explain working of n-p-n transistor in unbiased condition.
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.
asked
Sep 5, 2018
by
anonymous
Description : Compare P.N.P and N.P.N transistor.
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
asked
Aug 19, 2019
by
anonymous
Description : Draw construction of SCR using two transistor model. Explain its operation.
Answer :
Two Transistor Model of SCR or Thyristor
asked
Jul 25, 2019
by
anonymous
Description : Draw the V-I characteristics of power transistor.
Answer :
V-I characteristics of power transistor:
asked
Jul 25, 2019
by
anonymous
Description : Describe thermal runaway of transistor and explain how it can be avoided.
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
asked
Jul 24, 2019
by
anonymous
Description : Define α and β of the transistor.
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) .
asked
Jul 24, 2019
by
anonymous
Description : List various transistor biasing methods.
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.
asked
Jul 24, 2019
by
anonymous
Description : Transistor operating configurations
Answer :
Transistor operating configurations
asked
May 20, 2019
by
anonymous
Description : Define junction field effect transistor (JFET) and give an example.
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
asked
Sep 5, 2018
by
anonymous
Description : Define α & β and derive the relation between (α) &) (β) of transistor.
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)
asked
Sep 5, 2018
by
anonymous
Description : Define biasing of transistor
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 .
asked
Sep 5, 2018
by
anonymous
Description : With neat diagram explain working of NPN transistor.
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.
asked
Sep 5, 2018
by
anonymous
Description : Draw and explain self-basing of a transistor.
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
asked
Sep 5, 2018
by
anonymous
Description : Compare between CB , CE & CC transistor configuration.
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°
asked
Sep 4, 2018
by
anonymous
Description : Why transistor is called as bipolar device.
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.
asked
Sep 4, 2018
by
anonymous
asked
Mar 22, 2018
by
anonymous
asked
Mar 22, 2018
by
anonymous
Description : What is meant by distortion in amplifiers?
asked
Mar 10, 2018
by
anonymous
Description : ICB0 in a transistor can be reduced by reducing: (1) IB (2) VCC (3) IE (4) Temperature
Answer :
ICB0 in a transistor can be reduced by reducing: Temperature.
asked
Apr 9, 2018
by
anonymous
asked
Mar 29, 2018
by
anonymous
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?
asked
Mar 19, 2018
by
anonymous
Description : What is meant by body effect in MOSFET?
asked
Mar 19, 2018
by
anonymous
Description : What is meant by feedback in electronics?
asked
Mar 10, 2018
by
anonymous
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.
asked
Mar 10, 2018
by
anonymous
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
Description : What do you meant by POST? Give solution for the following error indication i. No beep ii. Continuous beep
Answer :
The PC has built - in test programs which do their jobs as soon as the PC is powered on. This Power On Self Test (POST) firmware is stored in ROM on the motherboard. This ROM occupies the ... board, or disconnected speaker. ii. Continuous beep: Checking of power supply system board, key board.
asked
Jun 29, 2020
by
anonymous
Description : What is meant by nuclear Fission ?
Answer :
Nuclear Fission:- The process in which heat energy is released without using oxygen for combustion in process is known as nuclear Fission.
asked
Aug 2, 2019
by
anonymous
Description : What do you meant by sensitivity list and zero modeling?
Answer :
Sensitivity list: Every concurrent statement has a sensitivity list. Statements are executed only when there is an event or signal in the sensitivity list, otherwise they are suspended. Ex. F
asked
Jul 22, 2019
by
anonymous
Description : What is meant by energy meter constant?
Answer :
Energy Meter Constant A fixed value which is used when converting meter readings to actual energy use, especially when potential transformers and similar types of equipment are used in metering. For example, K=--------rev/Kwh
asked
Sep 6, 2018
by
anonymous
Description : What is meant by Biot Savart law?
Answer :
Module 3 : MAGNETIC FIELD Lecture 15 : Biot- Savarts' Law Objectives In this lecture you will learn the following Study Biot-Savart's law Calculate magnetic field of induction due to some simple ... other circuit. NPTEL Distributed under Creative Commons Attribution-ShareAlike - CC BY-SA.
asked
May 30, 2018
by
anonymous
Description : What is meant by brand resonance?
asked
May 25, 2018
by
anonymous
Description : What is meant by resonance?
asked
May 25, 2018
by
anonymous
Description : What is meant by devoted computer ____. a) Which uses only one kind of software b) Which is used by only one person c) Which is assigned with only one task d) No such type of computers are available
Answer :
What is meant by devoted computer ____. a) Which uses only one kind of software b) Which is used by only one person c) Which is assigned with only one task d) No such type of computers are available
asked
May 13, 2018
by
anonymous
asked
Mar 22, 2018
by
anonymous
Description : What is meant by firing angle of thyristor?
Answer :
The point at which SCR is triggered is known as firings angle of thyristor.
asked
Mar 19, 2018
by
anonymous
Description : What is meant by resistance heating?
asked
Mar 11, 2018
by
anonymous
Description : What is meant by dielectric heating?
asked
Mar 11, 2018
by
anonymous
Description : What is meant by fuzzy system?
asked
Mar 10, 2018
by
anonymous