in which region BJT act as a switch?

by

2 Answers

Answer :

In saturation region BJT act as a switch.
by

Answer :

BJT act as switch in saturation and  cutoff region ( ON state in saturation region and OFF state in cut-off region )

by

Related questions

in which region BJT act as amplifier?

Last Answer : Active region of BJT act as amplifier.

in which BJT operating region both the junctions are reverse biased?

Last Answer : In cut-off region of BJT both the emitter-base junction and collector-base junction are reverse biased.

why IGBT is preferred as a power switch over both power BJT and MOSFET?

Last Answer : Because it has a higher switching frequency and heat tolerance.

An FET is a better chopper than a BJT because it has

Description : An FET is a better chopper than a BJT because it has (A) lower offset voltage (B) higher series ON resistance (C) lower input current (D) higher input impedance

Last Answer : An FET is a better chopper than a BJT because it has lower offset voltage

What is a BJT?

Description : What is a BJT?

Last Answer : Bipolar Junction Transistor (BJT): BJT is a Bipolar device. (Uses both electrons and holes charge carrier for current conduction) Two Junctions (Emitter junction & collector ... mode (Current amplification) Cutoff mode (Open switch) Saturation mode (Close switch)

is IGBT costlier than BJT and MOSFET?

Last Answer : Yes IGBT is costlier than BJT and MOSFET.

does the BJT have internal capacitance?

Last Answer : Yes BJT have internal capacitances.

what are the three operating regions of BJT?

Last Answer : Active , Saturation , Cut-off region of operations in BJT.

Does BJT have second breakdown problem?

Last Answer : Yes BJT have second breakdown problem.

Is BJT current controlled or voltage controlled?

Last Answer : BJT is current controlled device.

BJT have how many terminals?

Last Answer : BJT have three terminals Base, emitter and collector.

why bjt is called current controlled device?

Last Answer : In  BJT  there  is  movement  of   electrons  and  holes   accros  the  junctions  which  is  basicaly  current  flow.

when bjt is in cutoff ?

Last Answer : When Q-point is at cut off region means it is just above the horizontal axis VCE

what is bjt biasing?

Last Answer : The proper flow of zero signal collector current and the maintenance of the proper collector emmiter voltage during passage of single called as transistor biasing

bjt what is beta ?

Last Answer : Beta is the current gain which is the ratio of collector current to base current.

bjt is active or passive?

Last Answer : BJT control the flow of electron so it is a active device.

is bjt a voltage controlled device ?

Last Answer : No, BJT is a current controlled device .

what does bjt stand for?

Last Answer : Bipolar junction transistor

what are bjt amplifiers used for?

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

what are bjt transistors?

Description : what are bjt transistors?

Last Answer : Bjt transistor is a type of transistor which  uses both electrons and hole charge carrier.bjts are used as switches and amplifiers.They amplify currents.

Define Depletion region and Barrier voltage of PN junction.

Description : Define Depletion region and Barrier voltage of PN junction.

Last Answer : 1. Depletion region : The region consisting of immobile positive charge at n-side and immobile negative charge at p-side near the junction acts like a barrier and prevents the further flow of ... charge formed at the p-n junction is called barrier voltage, barrier potential or junction barrier.

Draw & explain touch plate switch using IC555.

Description : Draw & explain touch plate switch using IC555.

Last Answer : It is construct form monostable multivibrator , when metal plates touch by finger then voltage at pin number 2 goes to below 1/3 Vcc then output of lower comparator becomes high hence flip flop set and ... then output of timer goes low and it low till up to the metal plates touch by finger .

State 2 advantages of JFET over BJT.

Description : State 2 advantages of JFET over BJT.

Last Answer : Advantages of JFET over BJT: 1) High input impedance 2) Better thermal stability 3) Produce less noise 4) Smaller than BJT 5) Rugged in construction and simpler to fabricate 6) High degree of isolation between Input and Output. 

List specification of BJT.

Description : List specification of BJT.

Last Answer : * The bipolar junction transistor (BJT) has small signal current gain, α (hfb). * Maximum collector current Ic (max). * Maximum collector to emitter voltage, VCE (max). * Collector to emitter ... . * Collector to emitter cut off voltage, VCEO. * Base emitter saturation voltage, VBE (sat).

State reason BJT is called as bipolar junction transistor.

Description : State reason BJT is called as bipolar junction transistor.

Last Answer : BJT is called bipolar junction transistor because in BJT current conduction takes place due to majority as well as minority charge carriers.

List configurations of BJT.

Description : List configurations of BJT. 

Last Answer : Configurations of BJT : 1) Common Base (CB) configuration 2) Common Emitter (CE) configuration 3) Common Collector (CC) configuration

State the need of biasing of BJT.

Description : State the need of biasing of BJT.

Last Answer : Need of biasing: The basic need of transistor biasing is to keep the base-emitter (B-E) junction properly forward biased and the collector-emitter (C-E) junction properly reverse biased ... transistor biasing is necessary for normal and proper operation of transistor to be used for amplification. 

Draw circuit diagram of voltage divider biasing list two advantages of voltage divider biasing of BJT.

Description : Draw circuit diagram of voltage divider biasing list two advantages of voltage divider biasing of BJT.

Last Answer : Two advantages of voltage divider biasing of BJT. 1. It is very simple method of transistor biasing. 2. The biasing conditions can be very easily set. 3. there is no loading of ... 5. The resistor RE introduces a negative feedback. So all the advantages of negative feedback are obtained. 

Compare BJT with FET

Description : Compare BJT with FET

Last Answer : FET BJT It is unipolar device i.e. current in the device is carried either by electrons or holes It is bipolar device i.e. current in the device is carried either by ... from minority- carrier storage effects & therefore has lower switching speeds & cut-off frequencies. 

Compare between BJT and FET on the basis of (i) Biolar/Unipolar (ii) Tharmal Runaway (iii) Noise (iv) Applications

Description : Compare between BJT and FET on the basis of (i) Biolar/Unipolar (ii) Tharmal Runaway (iii) Noise (iv) Applications

Last Answer : Parameter BJT FET Bipolar/Unipolar It is bipolar device i.e. current in this device is carried by electrons and holes. It is unipolar device i.e. current ... in oscilloscopes, electronic voltmeters and other measuring and testing equipment because of their high input impedance.

If the base current of a BJT is 250 µA and emitter current is 15 mA, then the common base current gain will be

Description :  If the base current of a BJT is 250 µA and emitter current is 15 mA, then the common base current gain will be A) 0.98 B) 0.41 C) 59 D) 55  

Last Answer :  If the base current of a BJT is 250 µA and emitter current is 15 mA, then the common base current gain will be 0.98 

Which phenomenon is present in thyristors but absent in BJT, MOSFET and IGBT ?

Description : Which phenomenon is present in thyristors but absent in BJT, MOSFET and IGBT ? (A) forward conduction (B) latching (C) forward blocking (D) reverse breakdown

Last Answer : Which phenomenon is present in thyristors but absent in BJT, MOSFET and IGBT ? (A) forward conduction (B) latching (C) forward blocking (D) reverse breakdown

What is the difference between BJT and FET?

Description : What is the difference between BJT and FET?

Last Answer : BJT  is  a  current  opperated   transistor  while  FET   is  a  field   opperated  transistor.

What is a BJT amplifier?

Description : What is a BJT amplifier?

Last Answer : Bilpolar Juntion transistor , this fuction is control the current

Is the input impedance of MOSFET more than BJT and FET?

Description : Is the input impedance of MOSFET more than BJT and FET?

Last Answer : Yes, the input impedance of MOSFET more than BJT and FET.

Explain open emitter BJT drive circuit.

Description : Explain open emitter BJT drive circuit.

Last Answer : open emitter BJT drive circuit:

Explain the formation of parasitic BJT and parasitic diode in Power MOSFET.

Description : Explain the formation of parasitic BJT and parasitic diode in Power MOSFET. Can parasitic diode be used in same power electronics applications?

Last Answer : Parasitic Diode: The parasitic diode is in between drain and source. The MOSFET structure itself contains parasitic diode or body drain diode. This parasitic diode allows the reverse flow of current when the ... of MOSFET as a BJT collector. Parasitic BJT operates in the cut-off region.

Operating frequency of power MOSFET is higher than that of power BJT. Justify the statement.

Description : Operating frequency of power MOSFET is higher than that of power BJT. Justify the statement.

Last Answer : Power MOSFET have high turning on and turning off capability high switching speed of MOSFET is due to the high rate of change of drain voltage. The switching losses of power MOSFET ... lower frequency. Hence, operating frequency of power MOSFET is higher than that of power BJT.

Compare BJT, MOSFET and IGBT .

Description : Compare BJT, MOSFET and IGBT .

Last Answer : BJT MOSFET IGBT BJT is a current controlled device. MOSFET is a voltage controlled device. IGBT is a voltage controlled device. The input impedance of BJT is low. ... is minority carrier device. MOSFET is majority carrier device. IGBT is minority carrier device.

what is the value of Beta in power BJT?

Description : What is the value of Beta in power BJT?

Last Answer : The beta value in power BJT is 5 to 10.

Explain the on state losses in power BJT.

Description : Explain the on state losses in power BJT.

Last Answer : On state losses in power BJT: Transistor have four types of losses one is turn on state losses second is turn off state losses third is turn on switching losses and fourth is turn ... ON = VCE sat x IC With increasing collector current collector to emitter saturation voltage increases.

why igbt is used instead of bjt and mosfet?

Last Answer : ON state losses of IGBT is less as compared to MOSFET and BJT.

Should I switch to a credit union?

Description : Should I switch to a credit union?

Last Answer : I switched from a bank to a credit union a long time ago. Competitive interest rates, fewer fees, easier loan approvals, better customer service.

How to Replace a Light Switch

Description : How to Replace a Light Switch

Last Answer : How to Replace a Light Switch They say it only takes one idiot to change a light bulb, but to change a light switch requires the skill and carefulness of a handyman. If you have a malfunctioning or a ... doesn't have to be a hassle. Just remember these steps and switching a new switch will be easy.

How to Install a Timer Switch

Description : How to Install a Timer Switch

Last Answer : How to Install a Timer Switch A timer switch is a handy device that automatically turns off a switch after a fixed period of time. This is particularly useful when you have kids at home ... safety precautions when installing switches or anything that might put you in the direct path of electricity.

How To Install A Dimmer Switch

Description : How To Install A Dimmer Switch

Last Answer : How To Install A Dimmer Switch Having a room with a bright light is good, but there are instances when you need the lights to be lower than what you're accustomed. You need to have a dimmer switch, ... your home. Follow them properly, and you'll be able to fiddle with the light levels in your home.

How to Wire a Three-Way Switch ?

Description : How to Wire a Three-Way Switch ?

Last Answer : How to Wire a Three-Way Switch A three-way switch is the most common system installed in residential areas. This system is used to control a light and receptacle or more from two different switches ... wires for interior use. #14 wires are suggested to be used for protected circuits at 15 amperes.

Give the function of fuse and switch.

Description : Give the function of fuse and switch.

Last Answer : Functions of fuse:  * To break the circuit under fault condition.  * To provide overcurrent protection to the circuit.  * To provide short circuit protection to the circuit.  * To provide ...  * To make the electric circuit manually.  * To break the electric circuit manually.

State the function of : i) MCCB ii) ELCB iii) MCB iv) Switch.

Description : State the function of : i) MCCB ii) ELCB iii) MCB iv) Switch. 

Last Answer : i) MCB: Provide short circuit protection & over load protection to electrical loads.  ii) ELCB: Provides protection by detecting the unsafe magnitudes leakage currents flowing to earth and disconnecting ... rating.  iv) Switch: Make and break the electrical connection to the load manually.

Transfer switch

Description : Transfer switch

Last Answer : .embed-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; } .embed-container iframe, .embed-container object, .embed-container embed { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }