Why BJT is a current control device?

why the bjt is known as current controlled device and fet is known as voltage controlled device ?
Last Answer : Ans- 1. In BJT because of the current the output will vary. 2. Where as in FET by means of Voltage the output is varied.

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asked Oct 4, 2021 by itszee

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

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

676 views 1 answer

asked Apr 26, 2018 by anonymous

FET is advantageous in comparison with BJT because of...

FET is advantageous in comparison with BJT because of A) High input impedance B) High noise C) High gain bandwidth product D) Its current controlled behavior

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asked Apr 9, 2018 by anonymous

Compared to MOSFET operational amplifier, BJT operational amplifier has...

Compared to MOSFET operational amplifier, BJT operational amplifier has A) Higher input resistance B) Higher slew rate C) Lower input current D) Higher voltage gain

67 views 0 answers

asked Apr 5, 2018 by anonymous

What is a BJT?

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)

741 views 2 answers

asked Mar 10, 2018 by anonymous

Is BJT unipolar or bipolar Why?

Is BJT unipolar or bipolar Why?
Last Answer : Bipolar Junction Transistor (BJT) is a bipolar device because current is carried by both holes and electrons hence it is called bipolar.

112 views 1 answer

asked Jan 5, 2018 by anonymous

is IGBT costlier than BJT and MOSFET?

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

2.6k views 1 answer

asked Sep 29, 2017 by anonymous

does the BJT have internal capacitance?

Last Answer : Yes BJT have internal capacitances.

88 views 1 answer

asked Sep 27, 2017 by anonymous

in which region BJT act as a switch?

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

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asked Sep 27, 2017 by anonymous

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.

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asked Sep 27, 2017 by anonymous

in which region BJT act as amplifier?

Last Answer : Active region of BJT act as amplifier.

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asked Sep 27, 2017 by anonymous

what are the three operating regions of BJT?

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

2.7k views 2 answers

asked Sep 27, 2017 by anonymous

Does BJT have second breakdown problem?

Last Answer : Yes BJT have second breakdown problem.

99 views 1 answer

asked Sep 23, 2017 by anonymous

BJT have how many terminals?

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

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asked Sep 21, 2017 by anonymous

when bjt is in cutoff ?

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

108 views 1 answer

asked Sep 10, 2017 by anonymous

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

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asked Sep 10, 2017 by anonymous

bjt what is beta ?

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

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asked Sep 10, 2017 by anonymous

bjt is active or passive?

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

129 views 1 answer

asked Sep 10, 2017 by anonymous

what does bjt stand for?

Last Answer : Bipolar junction transistor

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asked Sep 10, 2017 by anonymous

what are bjt amplifiers used for?

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

88 views 1 answer

asked Sep 10, 2017 by anonymous

what are bjt transistors?

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.

107 views 1 answer

asked Sep 10, 2017 by anonymous

Which is the most suitable power device for high frequency ( more 100 kHz) switching application? a) Power MOSFET b) BJT c) SCR d) UJT

Which is the most suitable power device for high frequency ( more 100 kHz) switching application? a) Power MOSFET b) BJT c) SCR d) UJT
Last Answer : Ans: Power MOSFET

39 views 1 answer

asked Sep 2, 2021 by itszee

A modern power semiconductor device IGBT is combines the characteristics of a) BJT and MOSFET b) FCT and GTO c) SCR and MOSFET d) SCR and BJT

A modern power semiconductor device IGBT is combines the characteristics of a) BJT and MOSFET b) FCT and GTO c) SCR and MOSFET d) SCR and BJT
Last Answer : Ans: BJT and MOSFET

6 views 1 answer

asked Sep 2, 2021 by itszee

A bipolar junction transistor (BJT) is used as a power control switch by biasing it in the cut-off region

A bipolar junction transistor (BJT) is used as a power control switch by biasing it in the cut-off region (OFF state) or in the saturation region (ON state). In the ON state, for ... base-collector junction is reverse biased (D) both the base-emitter and base-collector junctions are forward biased
Last Answer : A BJT is as a power control switch by biasing it in cut-off region (OFF state) or in the saturation region (ON state). In ON state, for BJT both the base-emitter and base- collector junctions are forward biased

441 views 2 answers

asked May 18, 2018 by anonymous

Identify type of BJT configuration having following features : (i) BJT configuration having the least current gain. (ii) KIT configuration called as voltage follower. (iii) BJT configuration having current gain less than one. (iv) BJT configuration suitable for impedance matching. (v) BIT configuration suitable for voltage amplification. (vi) BJT configuration having the least output impedance.

Identify type of BJT configuration having following features : (i) BJT configuration having the least current gain. (ii) KIT configuration called as voltage follower. (iii) BJT ... configuration suitable for voltage amplification. (vi) BJT configuration having the least output impedance.
Last Answer : (i) BJT configuration having the least current gain : Common Base Configuration (ii) KIT configuration called as voltage follower: Common Collector Configuration (iii) BJT ... Emitter Configuration (vi) BJT configuration having the least output impedance: Common Collector Configuration

2.7k views 1 answer

asked Jul 10, 2019 by anonymous

Compare BJT common base configuration with common collector configuration on the basis of (i) Current gain (ii) Voltage gain (iii) Input impedance (iv) Output impedance

Compare BJT common base configuration with common collector configuration on the basis of (i) Current gain (ii) Voltage gain (iii) Input impedance (iv) Output impedance
Last Answer : Parameter Common Base Common Collector Current gain Low (About 1) High (1+β) Voltage gain High 1 Input impedance Low High Output impedance High Low

181 views 1 answer

asked Sep 2, 2018 by anonymous

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

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

190 views 1 answer

asked Jun 18, 2018 by anonymous

The seven segment arrangement for numerical display on consoles, test meters and other applications can be either ________________. A. UJT or BJT B. BCD or OCD C. JFET or IGFET D. LED or LCD

The seven segment arrangement for numerical display on consoles, test meters and other applications can be either ________________. A. UJT or BJT B. BCD or OCD C. JFET or IGFET D. LED or LCD
Last Answer : Answer: D

5 views 1 answer

asked Jan 4 by itszee

Draw the output characteristics of BJT in CE configuration and label various regions on it.

Draw the output characteristics of BJT in CE configuration and label various regions on it.
Last Answer : output characteristics of BJT in CE configuration

87 views 1 answer

asked Apr 15, 2021 by anonymous

State the applications of BJT.

State the applications of BJT.
Last Answer : Applications of BJT: 1. As a switch 2. As an amplifier 3. As a multivibrator 4. As a oscillator 5. As a timer circuit 6. As a Logic circuits 7. Delay circuits

17 views 1 answer

asked Apr 15, 2021 by anonymous

Draw the construction of BJT (NPN) and explain its working principle. State and explain different operating regions.

Draw the construction of BJT (NPN) and explain its working principle. State and explain different operating regions.
Last Answer : Construction of BJT (NPN): Working of NPN Transistor : The circuit diagram of the NPN transistor is shown in the figure below. The forward biased is applied across the emitter-base ... Zero with input current is Zero transistor in cut off. In this region transistor act as open switch

134 views 1 answer

asked Apr 6, 2021 by anonymous

Define the following with respect to BJT. (i) Input resistance (ii) Output resistance

Define the following with respect to BJT. (i) Input resistance (ii) Output resistance
Last Answer : Input resistance: It is the ratio of small change in emitter -to-base voltage(∆VEB) to the resulting change in emitter current (∆IE) for a constant collector to base voltage(VCB) ... of BJT is ratio of voltage between output terminal and common terminal to current through output terminal.

11 views 1 answer

asked Apr 6, 2021 by anonymous

State 2 advantages of JFET over BJT.

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.

235 views 1 answer

asked Jun 24, 2020 by anonymous

Name two types of BJT &draw their symbols.

Name two types of BJT &draw their symbols.
Last Answer : Two types of BJT: * NPN * PNP

29 views 1 answer

asked Jun 24, 2020 by anonymous

List the types of coupling used in BJT amplifier.

List the types of coupling used in BJT amplifier.
Last Answer : Types of coupling used in BJT amplifier: i. Resistance capacitance (RC)coupling ii. Impedance coupling iii. Transformer coupling iv. Direct coupling

259 views 1 answer

asked Jun 5, 2020 by anonymous

Comparison of three configuration of BJT

Comparison of three configuration of BJT
Last Answer : Parameter Common Base(CB) Common Emitter (CE) Common collector (CC) Input terminal Emitter Base Base Common terminal Base Emitter Collector Output terminal Collector Collector Emitter Gain factor Alpha(Ic/Ie) Beta(Ic/Ib) Gamma(Ie/Ib)

167 views 1 answer

asked May 26, 2020 by anonymous

Comparison of BJT and FET

Comparison of BJT and 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 both ... is comparatively more noisy. It is relatively immune to radiation. It is susceptible to radiation

55 views 2 answers

asked May 26, 2020 by anonymous

Draw circuit diagram of two stage RC coupled amplifier using BJT

Draw circuit diagram of two stage RC coupled amplifier using BJT
Last Answer : BJT - To amplify input signal. R1 & R2 = Biasing resistor to provide DC biasing voltage RE = Emitter resistor to control gain RL = Load resistor to carry load current Cin = Cout = Coupling capacitors to block DC CE = emitter bypass resistor

213 views 1 answer

asked May 26, 2020 by anonymous

Draw symbol of NPN transistor and state three configurations of transistor (BJT)

Draw symbol of NPN transistor and state three configurations of transistor (BJT)
Last Answer : Configuration - Common Emitter Common Collector Common Base

57 views 1 answer

asked May 26, 2020 by anonymous

List specification of BJT.

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).

109 views 1 answer

asked May 2, 2020 by anonymous

State reason BJT is called as bipolar junction transistor.

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.

5.1k views 1 answer

asked Jul 24, 2019 by anonymous

List configurations of BJT.

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

65 views 1 answer

asked Jul 10, 2019 by anonymous

State the need of biasing of BJT.

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.

262 views 2 answers

asked Sep 5, 2018 by anonymous

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

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.

778 views 1 answer

asked Sep 5, 2018 by anonymous

Compare BJT with FET

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.

69 views 1 answer

asked Sep 5, 2018 by anonymous

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

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.

757 views 1 answer

asked Sep 5, 2018 by anonymous

anonymous · Answer 1 · 2018-02-04T18:01:19+0000

BJT have three terminal emitter, base and collector. The collector current is the output current. The collector current (I_c) is controlled by base current hence BJT is called current controlled device.

Why BJT is a current control device?

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