Is BJT current controlled or voltage controlled?

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asked Sep 23, 2017 by anonymous

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asked Sep 10, 2017 by anonymous

is bjt a voltage controlled device ?

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

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asked Sep 23, 2017 by anonymous

MOSFET are current controlled or voltage controlled devices?

Last answer: MOSFET are voltage controlled devices.

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asked Sep 10, 2017 by anonymous

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.

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asked Sep 10, 2017 by anonymous

why mosfet is voltage controlled device?

Last answer: already answered here is mosfet current controlled device?

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asked Sep 13, 2017 by anonymous

is igbt current controlled device ?

Last answer: No, IGBT is not the current controlled device. IGBT is a voltage controlled device. IGBT have combine qualities of MOSFET and BJT. The high switching speed of MOSFET and low conduction losses of BJT. Also, IGBT which stands for Insulated Gate Bipolar Transistor have high input impedance.

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asked Sep 10, 2017 by anonymous

why thyristor is called semi controlled device?

Last answer: Thyristor can only be turned on by small gate pulse but it cannot be turn off by using gate hence thyristor is called semi controlled device.

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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.

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asked Apr 30, 2018 by anonymous

A current controlled voltage source is equivalent to :

A current controlled voltage source is equivalent to : (A) series voltage feed -back amplifier (B) shunt current feed -back amplifier (C) shunt voltage feed -back amplifier (D) series current feed -back amplifier

Last answer: A current controlled voltage source is equivalent to : shunt voltage feed -back amplifier

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asked May 1, 2018 by anonymous

The speed of a three-phase induction motor is controlled by variable voltage variable frequency control

The speed of a three-phase induction motor is controlled by variable voltage variable frequency control (i.e. keeping V/f constant). As the frequency is reduced, the slip at maximum torque (1) Decreases (2) Increases (3) Remains constant (4) None of the above

Last answer: The speed of a three-phase induction motor is controlled by variable voltage variable frequency control (i.e. keeping V/f constant). As the frequency is reduced, the slip at maximum torque Increases

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asked Apr 28, 2018 by anonymous

In voltage source converter based HVDC transmission system the active power is controlled by changing

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asked Apr 27, 2018 by anonymous

For a 15-bus power system with 3 voltage controlled buses, the size of Jacobian matrix is

Last answer: For a 15-bus power system with 3 voltage controlled buses, the size of Jacobian matrix is 25 x 25

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asked Apr 29, 2018 by anonymous

A 3 -phase, fully controlled, converter is feeding power into a DC load at a constant current of 150 A, the rms

A 3 -phase, fully controlled, converter is feeding power into a DC load at a constant current of 150 A, the rms value of the current flowing through each thyristor of the converter is

Last answer: A 3 -phase, fully controlled, converter is feeding power into a DC load at a constant current of 150 A, the rms value of the current flowing through each thyristor of the converter is 150/√3

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asked Mar 21, 2018 by anonymous

The gravity controlled instrument has crowded scale because current is proportional to?

Last answer: The gravity controlled instrument has crowded scale because current is proportional to sine of deflection angle.

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asked Apr 29, 2018 by anonymous

When the firing angle a of a single-phase, fully controlled rectifier feeding constant direct current into a

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Last answer: When the firing angle a of a single-phase, fully controlled rectifier feeding constant direct current into a load is 30°, the displacement power factor of the rectifier is √3/2

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asked Jun 18, 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

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asked Apr 26, 2018 by anonymous

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

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537 views 1 answer

asked Mar 10, 2018 by anonymous

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)

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asked Sep 29, 2017 by anonymous

is IGBT costlier than BJT and MOSFET?

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

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asked Sep 10, 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

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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 5, 2018 by anonymous

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.

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asked Sep 27, 2017 by anonymous

does the BJT have internal capacitance?

Last answer: Yes BJT have internal capacitances.

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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.

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asked Sep 23, 2017 by anonymous

Does BJT have second breakdown problem?

Last answer: Yes BJT have second breakdown problem.

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asked Sep 21, 2017 by anonymous

BJT have how many terminals?

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

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asked Sep 10, 2017 by anonymous

what does bjt stand for?

Last answer: Bipolar junction transistor

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what are bjt amplifiers used for?

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

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asked Sep 10, 2017 by anonymous

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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.

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asked Oct 13, 2019 by anonymous

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asked Oct 13, 2019 by anonymous

Single-phase Midpoint controlled rectifier with Resistive load

Last answer: Single-phase Midpoint controlled rectifier with Resistive load: 1) During positive half cycle of AC supply, a is positive with respect to b , this makes T1 forward biased and T2 is reverse ... voltage reverses the polarity and T2 is turned off. The operation is as shown in waveforms.

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asked Jul 25, 2019 by anonymous

Give the operation of single phase full wave bridge controlled converter with RL load with a neat diagram. Also draw its waveform.

Last answer: Single phase fully control bridge converter with RL load: 1. During positive half cycle of input voltage, T1 and T2 are forward biased and during negative half cycle, T3 and T4 are forward biased. Therefore, T1-T2 ... cycle till the firing of next pair of SCRs as shown in the waveform.

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asked Jul 25, 2019 by anonymous

Draw a neat diagram of 1Ф half wave controlled converter with RL load. Give its operation.

Last answer: Single phase fully controlled half wave converter: The circuit diagram of single-phase half-wave controlled rectifier with RL load and without freewheeling diode is shown in Fig. (a). The SCR T is ... , when again pulse is applied, the SCR is turned on & the above cycle is repeated.

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asked Sep 8, 2018 by anonymous

How are nuclear reactors controlled? Explain two different methods in brief.

Last answer: Nuclear reactor is controlled using control rods: Control rods are made up of very high neutron absorbing material like boron, cadmium. By adjusting height of control rods on reactor core ... of nuclear reaction will increase. Whereas by pushing control rod towards the core it will reduce.

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asked Apr 28, 2018 by anonymous

A 230 V, 50 Hz phase controlled single-phase full-controlled SCR bridge converter draws 15 A constant dc

A 230 V, 50 Hz phase controlled single-phase full-controlled SCR bridge converter draws 15 A constant dc current. If the source inductance is 3 mH, the drop in dc output voltage is (A) 4.5 V (B) 6.75 V (C) 9 V (D) 13.5 V

Last answer: A 230 V, 50 Hz phase controlled single-phase full-controlled SCR bridge converter draws 15 A constant dc current. If the source inductance is 3 mH, the drop in dc output voltage is 9 V

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asked Mar 15, 2018 by anonymous

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asked Aug 25, 2017 by anonymous

Chopper controlled DC motor

Last answer: Chopper controlled DC motor

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asked Jul 24, 2019 by anonymous

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.

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4.9k views 1 answer

asked Apr 28, 2018 by anonymous

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

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

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3.0k views 1 answer

asked Mar 19, 2018 by anonymous

What is the difference between BJT and FET?

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

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asked Mar 19, 2018 by anonymous

What is a BJT amplifier?

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75 views 0 answers

asked Mar 19, 2018 by anonymous

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

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

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286 views 1 answer

asked Feb 20, 2018 by anonymous

What is the difference between beta and forced beta for BJT?

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518 views 0 answers

asked Feb 3, 2018 by anonymous

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.

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692 views 1 answer

anonymous · Answer 1 · 2017-09-23T11:59:51+0000

answered Sep 23, 2017 by anonymous

BJT is a current controlled device.

jihadio k jeeja · Answer 2 · 2017-12-06T20:39:03+0000

answered Dec 6, 2017 by jihadio k jeeja

Current controlled

NITIN P. DESHMUKH · Answer 3 · 2018-01-21T17:10:04+0000

answered Jan 21, 2018 by NITIN P. DESHMUKH

Current control

Neha8235 · Answer 4 · 2018-05-22T00:55:24+0000

answered May 22, 2018 by Neha8235

BJT is current controlled device.

Is BJT current controlled or voltage controlled?

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