Last Answer : Yes BJT have second breakdown problem.
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100 views
1 answer
asked
Sep 23, 2017
by
anonymous

Explain zener breakdown and avalanche breakdown.
Last Answer : The Zener Breakdown and Avalanche Breakdown are two different mechanisms by which a PN junction breaks. The Zener and Avalanche breakdown both occur in diode under reverse bias. The avalanche breakdown ... in the PN junction and causes breakdown. The process is known as the Avalanche breakdown.
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190 views
1 answer
asked
Aug 19, 2019
by
anonymous

Define : (i) Dielectric strength (ii) Breakdown voltage
Last Answer : (i) Dielectric strength: The voltage which a dielectric material can withstand without breaking down (without losing its dielectric property) is called its dielectric strength. It is represented by kV/mm ... or is no longer an insulator) for a specified thickness, is its breakdown voltage.
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114 views
1 answer
asked
Sep 4, 2018
by
anonymous

The electric breakdown strength of insulating materials depends on (A) Nature of applied voltage (B) lmperfection of dielectric material (C) Pressure, temperature and humidity (D) All or these
Last Answer : The electric breakdown strength of insulating materials depends on (A) Nature of applied voltage (B) lmperfection of dielectric material (C) Pressure, temperature and humidity (D) All or these
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999 views
1 answer
asked
May 8, 2018
by
anonymous

What is dielectric breakdown strength?
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77 views
0 answers
asked
Mar 10, 2018
by
anonymous

The second harmonic distortion is defined as the A) Ratio of amplitude of second harmonic component in the output to that of the fundamental frequency B) Harmonic distortion due to only second harmonic component C) Sum of distortion of first and second harmonic components in the output
Last Answer : The second harmonic distortion is defined as the Ratio of amplitude of second harmonic component in the output to that of the fundamental frequency
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116 views
1 answer
asked
Jun 18, 2018
by
anonymous

Last Answer : Yes IGBT is costlier than BJT and MOSFET.
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2.6k views
1 answer
asked
Sep 29, 2017
by
anonymous

Last Answer : MOSFET are voltage controlled devices.
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153 views
3 answers
asked
Sep 23, 2017
by
anonymous

Last Answer : MOSFETs are of two types namely 1) enhancement type MOSFET or E-MOSFET 2) depletion type MOSFET or D-MOSFET
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122 views
2 answers
asked
Sep 22, 2017
by
anonymous

Last Answer : MOSFET have high current losses due to High on state resistance. Hence MOSFET is used for low power applications.
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113 views
1 answer
asked
Sep 22, 2017
by
anonymous

Last Answer : Because of positive temperature coefficient of mosfet the paralleling of mosfet is easier.
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73 views
1 answer
asked
Sep 22, 2017
by
anonymous

Last Answer : Yes MOSFET can operate at very high frequency.
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104 views
1 answer
asked
Sep 22, 2017
by
anonymous

what are the uses of MOSFET ?
Last Answer : Choppers and inverters and where high switching frequency is required.
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100 views
1 answer
asked
Aug 13, 2017
by
Zeeshan

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.
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104 views
1 answer
asked
Aug 6, 2017
by
anonymous

Newton’s Second Law can be written in equation form:
Last Answer : F = ma. For falling objects we can write F=mg where g is the acceleration due to gravity. The force of gravity is what causes free falling objects to accelerate. These objects all accelerate at the same rate of 9.8 meters/sec^2.
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11 views
1 answer

How to Teach English as a Second Language ?
Last Answer : How to Teach English as a Second Language The English language is fast becoming the language of choice for business, trade, and international relations. Knowledge of the English language is also necessary for ... With these tips, you can help students learn and use English to get ahead in life.
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14 views
1 answer
asked
May 6, 2021
by
anonymous

A transfer function has a second order denominator and constant gain in the numerator
Last Answer : A transfer function has a second order denominator and constant gain in the numerator the system has two zeros at infinity
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208 views
1 answer
asked
May 3, 2018
by
anonymous
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A second order system shows 100% overshoot in its unit step response. It can be categorized as (A) underdamped system. (B) overdamped system. (C) Critically damped system. (D) undamped system.
Last Answer : A second order system shows 100% overshoot in its unit step response. It can be categorized as undamped system.
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103 views
1 answer
asked
Apr 28, 2018
by
anonymous

Joule X second is the unit of?
Last Answer : Joule X second is the unit of power .
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57 views
1 answer
asked
Sep 20, 2017
by
anonymous

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.
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106 views
1 answer
asked
May 2, 2020
by
anonymous

67 views
0 answers
asked
Aug 12, 2019
by
aku

What parameters are to be considered when choosing a MOSFET?
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55 views
0 answers
asked
Aug 3, 2019
by
anonymous

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.
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3.6k views
1 answer
asked
Jul 25, 2019
by
anonymous

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
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89 views
1 answer
asked
Jul 25, 2019
by
anonymous

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
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109 views
1 answer
asked
Sep 5, 2018
by
anonymous

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.
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659 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 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
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149 views
1 answer
asked
Jun 18, 2018
by
anonymous

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
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112 views
1 answer
asked
Jun 18, 2018
by
anonymous

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
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319 views
1 answer
asked
Apr 28, 2018
by
anonymous

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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3.2k views
1 answer
asked
Apr 28, 2018
by
anonymous

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.
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218 views
3 answers
asked
Mar 19, 2018
by
anonymous

What is the transconductance of a MOSFET?
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60 views
0 answers
asked
Mar 19, 2018
by
anonymous

What is meant by pinch off voltage in MOSFET?
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102 views
0 answers
asked
Mar 19, 2018
by
anonymous

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.
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313 views
2 answers
asked
Mar 19, 2018
by
anonymous

What is meant by body effect in MOSFET?
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66 views
0 answers
asked
Mar 19, 2018
by
anonymous

How can we check a Mosfet?
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72 views
0 answers
asked
Mar 19, 2018
by
anonymous

What is the use of a Mosfet?
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52 views
0 answers
asked
Mar 19, 2018
by
anonymous

Why Mosfet is called Mosfet?
Last Answer : Why Mosfet is called Mosfet?
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74 views
1 answer
asked
Mar 19, 2018
by
anonymous

What is the work of MOSFET?
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75 views
0 answers
asked
Mar 19, 2018
by
anonymous

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.
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487 views
1 answer
asked
Mar 19, 2018
by
anonymous

MOSFET uses the electric field of?
Last Answer : MOSFET uses the electric field of gate capacitance.
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101 views
1 answer
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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553 views
1 answer
asked
Mar 19, 2018
by
anonymous

Explain switching model of MOSFET.
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75 views
0 answers
asked
Mar 10, 2018
by
anonymous

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.
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349 views
1 answer
asked
Feb 19, 2018
by
anonymous

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.
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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.
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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985 views
1 answer
asked
Feb 3, 2018
by
anonymous
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Justify the statement. Antiparallel diode is connected across MOSFET.
Last Answer : In MOSFET current is flow from drain to source but when the load is inductive the current may flow in opposite direction. To avoid the opposite flow of current and to protect MOSFET the antiparallel diode is connected across MOSFET.
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161 views
1 answer
asked
Feb 2, 2018
by
anonymous

parallel operation of MOSFET can be done more easily as compared to thyristor. why?
Last Answer : Parallel operation of MOSFET can be done more easily as compared to thyristor because the resistance of MOSFET is increases with increase in temperature. MOSFET have the positive temperature coefficient. In ... the parallel operation of MOSFET can be done more easily as compared to the thyristor.
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300 views
1 answer
asked
Dec 7, 2017
by
anonymous

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.
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844 views
1 answer
asked
Dec 7, 2017
by
anonymous
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Explain difference between enhancement MOSFET and depletion type MOSFET.
Last Answer : In enhancement MOSFET channel is not initially exists but in depletion MOSFET channel is already exists. In case of depletion MOSFET if the voltage is applied between drain and source the drain current will flow ... a channel. depletion MOSFET & enhancement MOSFET
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550 views
1 answer
asked
Nov 14, 2017
by
anonymous
