MOSFET are current controlled or voltage controlled devices?

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.

216 views 1 answer

asked Sep 13, 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.

1.1k views 1 answer

asked Sep 10, 2017 by anonymous

is mosfet current controlled device?

Last Answer : No, MOSFET is not the curent controlled device. The current between drain and source which is drain current is controlled by applying a voltage between gate and source hence MOSFET is a voltage controlled device.

201 views 1 answer

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.

363 views 2 answers

asked Sep 10, 2017 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 MOSFET have a second breakdown problem?

Last Answer : No MOSFET do not have a second breakdown problem.

92 views 1 answer

asked Sep 23, 2017 by anonymous

What are the two types of mosfet?

Last Answer : MOSFETs are of two types namely 1) enhancement type MOSFET or E-MOSFET 2) depletion type MOSFET or D-MOSFET

121 views 2 answers

asked Sep 22, 2017 by anonymous

Why MOSFET is used for low power applications?

Last Answer : MOSFET have high current losses due to High on state resistance. Hence MOSFET is used for low power applications.

113 views 1 answer

asked Sep 22, 2017 by anonymous

Why paralleling of mosfet is easier?

Last Answer : Because of positive temperature coefficient of mosfet the paralleling of mosfet is easier.

71 views 1 answer

asked Sep 22, 2017 by anonymous

Can MOSFET operate at very high frequency?

Last Answer : Yes MOSFET can operate at very high frequency.

102 views 1 answer

asked Sep 22, 2017 by anonymous

what are the uses of MOSFET ?

what are the uses of MOSFET ?
Last Answer : Choppers and inverters and where high switching frequency is required.

100 views 1 answer

asked Aug 13, 2017 by Zeeshan

what is MOSFET ?

what is MOSFET ?
Last Answer : MOSFET is a type of Field Effect Transistor (FET). It is a voltage controlled transistor. MOSFET have very high input impedance. It can be use with very low current circuits. It is very fast ... of Nano ampere. There are two types of MOSFET one is enhancement mode and second is depletion mode.

104 views 1 answer

asked Aug 6, 2017 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

119 views 1 answer

asked Apr 30, 2018 by anonymous

The threshold voltage of an n- channel enhancement mode MOSFET is 0.5V when the device is biased at

The threshold voltage of an n- channel enhancement mode MOSFET is 0.5V when the device is biased at a gate voltage of 3V. Pinch off would be occurs at a drain voltage of (A) 1.5V (B) 2.5V (C) 3.5V (D) 4.5V
Last Answer : The threshold voltage of an n- channel enhancement mode MOSFET is 0.5V when the device is biased at a gate voltage of 3V. Pinch off would be occurs at a drain voltage of 2.5V

314 views 1 answer

asked Apr 28, 2018 by anonymous

What is meant by pinch off voltage in MOSFET?

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asked Mar 19, 2018 by anonymous

Justify. Power MOSFET is operated at high enough gate source voltage to minimize the conduction losses.

Justify. Power MOSFET is operated at high enough gate source voltage to minimize the conduction losses.
Last Answer : MOSFET is metal oxide field effect transistor. MOSFET is a voltage controlled device. MOSFET is majority carrier device. MOSFET are of two one is n-channel MOSFET and p-channel MOSFET. Gate, ... . Hence, power MOSFET is operated at high enough gate-source voltage to minimize the conduction losses.

842 views 1 answer

asked Dec 7, 2017 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

234 views 1 answer

asked May 1, 2018 by anonymous

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

In voltage source converter based HVDC transmission system the active power is controlled by changing (A) phase angle of the converter ac input voltage (B) supply frequency of the converter ac input voltage (C) magnitude of the converter ac input voltage (D) DC voltage at the inverter terminals
Last Answer : In voltage source converter based HVDC transmission system the active power is controlled by changing phase angle of the converter ac input voltage

136 views 1 answer

asked Apr 28, 2018 by anonymous

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

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

2.2k views 1 answer

asked Apr 27, 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 : Please show the solution for this question

515 views 2 answers

asked Apr 29, 2018 by anonymous

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

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
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

1.4k views 1 answer

asked Apr 29, 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.

337 views 1 answer

asked Mar 21, 2018 by anonymous

State advantages of MOSFET.

State advantages of MOSFET.
Last Answer : Advantages of MOSFET * MOSFETs provide greater efficiency while operating at lower voltages. * Absence of gate current results in high input impedance. * High switching speed. * They operate at lower ... due to lower resistance of channel. * They are easy to manufacture. * They are portable.

105 views 1 answer

asked May 2, 2020 by anonymous

Plot Vgs vs Vds characteristics of a common source mosfet

65 views 0 answers

asked Aug 12, 2019 by aku

What parameters are to be considered when choosing a MOSFET?

55 views 0 answers

asked Aug 3, 2019 by anonymous

Describe with neat sketch the construction and working principle of MOSFET.

Describe with neat sketch the construction and working principle of MOSFET.
Last Answer : Construction and working principle of MOSFET: A) Depletion type MOSFET: Construction: The N-channel depletion type MOSFET is formed on P-type silicon substrate with two heavily ... accumulation of electrons and hence more current. Thus the MOSFET is a gate voltage controlled device.

3.5k views 1 answer

asked Jul 25, 2019 by anonymous

State the applications of MOSFET

State the applications of MOSFET
Last Answer : Applications of MOSFET: i) Switching-mode-power-supplies (SMPS) and linear power supplies. ii) Brushless DC motor drives iii) Solid state DC relay iv) Automobile applications v) Stepper motor controller vi) Lighting controls vii) Solenoid drivers viii) Robotics ix) Induction heating

87 views 1 answer

asked Jul 25, 2019 by anonymous

Compare JFET with MOSFET.

Compare JFET with MOSFET.
Last Answer : Particulars JFET MOSFET 1) Type Voltage controlled device Voltage controlled device 2) Mode of operation Operates only in depletion mode Operates in depletion and enhancement ... 6) Gate connection Not isolated from substrate Isolated by SiO2 layer from substrate

108 views 1 answer

asked Sep 5, 2018 by anonymous

Describe the operation of N channel enhancement type MOSFET with diagram.

Describe the operation of N channel enhancement type MOSFET with diagram.
Last Answer : As its name indicates, this MOSFET operates only in the enhancement mode and has no depletion mode. It operates with large positive gate voltage only. It does not conduct when the ... of charge carriers attracted to the positive gate. Thus drain current is controlled by the gate potential.

635 views 1 answer

asked Sep 5, 2018 by anonymous

A certain power MOSFET has a maximum junction temperature specification of 1500o C, a junction-to-case

A certain power MOSFET has a maximum junction temperature specification of 1500o C, a junction-to-case thermal resistance of 1.00 C/W, and a junction-to ambient thermal resistance of 600 C/W. If the ambient temperature is 300o C ... the device will be A) 1.52 W B) 1.72 W C) 1.92W D) 2.00 W
Last Answer : A certain power MOSFET has a maximum junction temperature specification of 1500o C, a junction-to-case thermal resistance of 1.00 C/W, and a junction-to ambient thermal resistance of ... 300o C, then the maximum allowable power dissipation in the device will be 2.00 W

148 views 1 answer

asked Jun 18, 2018 by anonymous

When does the Body bias effect occur in an n-channel MOSFET?

When does the Body bias effect occur in an n-channel MOSFET? A) When the Source voltage is less the Bulk voltage B) When the Source voltage is equal to or greater the Bulk voltage C) When the Drain voltage is equal to the Bulk voltage D) When the Gate voltage is equal to the Bulk Voltage
Last Answer : When does the Body bias effect occur in an n-channel MOSFET? A) When the Source voltage is less the Bulk voltage B) When the Source voltage is equal to or greater the Bulk voltage C) ... voltage is equal to the Bulk voltage D) When the Gate voltage is equal to the Bulk Voltage

109 views 1 answer

asked Jun 18, 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

3.2k views 1 answer

asked Apr 28, 2018 by anonymous

A MOSFET has how many terminals?

A MOSFET has how many terminals?
Last Answer : A MOSFET having three terminals 1st one is Gate (insulated), 2nd one is Source and 3rd one is Drain.

216 views 3 answers

asked Mar 19, 2018 by anonymous

What is the transconductance of a MOSFET?

59 views 0 answers

asked Mar 19, 2018 by anonymous

What is channel length modulation in MOSFET?

What is channel length modulation in MOSFET?
Last Answer : Shortening of lenght of the inverted channel region with increase in drain bias for large drain biases due to which current increases with drain bias and output resistance decreases is called channel length modulation in MOSFET.

313 views 2 answers

asked Mar 19, 2018 by anonymous

What is meant by body effect in MOSFET?

66 views 0 answers

asked Mar 19, 2018 by anonymous

How can we check a Mosfet?

72 views 0 answers

asked Mar 19, 2018 by anonymous

What is the use of a Mosfet?

52 views 0 answers

asked Mar 19, 2018 by anonymous

Why Mosfet is called Mosfet?

Why Mosfet is called Mosfet?
Last Answer : Why Mosfet is called Mosfet?

73 views 1 answer

asked Mar 19, 2018 by anonymous

What is the work of MOSFET?

75 views 0 answers

asked Mar 19, 2018 by anonymous

In MOSFET, the polarity of the inversion layers is the same as that of?

In MOSFET, the polarity of the inversion layers is the same as that of?
Last Answer : In MOSFET, the polarity of the inversion layers is the same as that of majority carriers in the source.

482 views 1 answer

asked Mar 19, 2018 by anonymous

MOSFET uses the electric field of?

MOSFET uses the electric field of?
Last Answer : MOSFET uses the electric field of gate capacitance.

101 views 1 answer

asked Mar 19, 2018 by anonymous

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

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

544 views 1 answer

asked Mar 19, 2018 by anonymous

Explain switching model of MOSFET.

75 views 0 answers

asked Mar 10, 2018 by anonymous

Explain MOSFET gate drive circuit and totem pole configuration.

Explain MOSFET gate drive circuit and totem pole configuration.
Last Answer : MOSFET gate drive circuit: The turning on and turning off of MOSFET can be controlled from gate to source voltage signal. If the gate to source voltage of MOSFET exceeds threshold ... this configuration, the two switches (transistors) are used in totem pole arrangement with a comparator.

348 views 1 answer

asked Feb 19, 2018 by anonymous

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

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.

2.6k views 1 answer

asked Feb 6, 2018 by anonymous

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

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.

983 views 1 answer

asked Feb 3, 2018 by anonymous

anonymous · Answer 1 · 2017-09-23T12:01:53+0000

Answer :

MOSFET are voltage controlled devices.

answered Sep 23, 2017 by anonymous

anonymous · Answer 2 · 2017-09-26T18:57:03+0000

mosfet are voltage controlled devices.Depending upon the Gate voltage the length of the channel can be varied accordingly in terms of increase or decrease.It is important to note however that the drain to source voltage also has an effect on mosfet considering it's characteristics which is also known as channel length modulation.

Neha8235 · Answer 3 · 2018-05-22T00:54:20+0000

Answer :

MOSFET are voltage controlled devices.

answered May 22, 2018 by Neha8235

MOSFET are current controlled or voltage controlled devices?

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