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What is meant by body effect in MOSFET?

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Description : 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 

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 

Answer : Effect of a force on a body depends upon magnitude, direction, position or line of action.

Description : What is meant by pinch off voltage in MOSFET?

Description : What is channel length modulation in MOSFET?

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.

Description : What is the transconductance of a MOSFET?

Description : What is the use of a Mosfet?

Description : What is the work of MOSFET?

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

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

Description : 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

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 

Description : A MOSFET has how many terminals?

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

Description : How can we check a Mosfet?

Description : Why Mosfet is called Mosfet?

Description : MOSFET uses the electric field of?

Answer : MOSFET uses the electric field of gate capacitance.

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

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

Description : If a rigid body is in equilibrium under the action of three forces, then?

Answer : If a rigid body is in equilibrium under the action of three forces, then the lines of action of these forces meet in a point, the lines of action of these forces are parallel.

Description : Human Body Quiz

Answer : Human Body Quiz In 24 hours, An average human heart beats 1,03,689 times. In 24 hours, An average human Lungs respire 23,045 times. In 24 hours, An average human Blood flows ... of the backbone is important to have sufficient breathing. Like fingerprints, everyone's tongue print is different.

Description : Human Body did you know facts

Answer : Human Body did you know facts Did you Know a human can't kill himself by holding his breath, even if he tries, he will pass out and keep breathing. Did you Know 80% of the human brain is ... Know the nose and ears never stop growing as you mature, they will keep growing till the day you die.

Description : How to quickly lose weight without harming the body?

Answer : Many people, experimenting with the next diet, do not fully understand how dangerous this or that method of losing weight can be for the body. Overweight, as you know, not only spoils the ... spontaneous. Then weight correction will not affect the health of a losing weight person in any way. 

Description : Capacitance is the ability of a body to store an__________.  (A) electrical charge (B) electric current (C) voltage (D) All of the above

Answer : Capacitance is the ability of a body to store an electrical charge 

Description : If a suspended body is struck at the center of percussion, then the pressure on die axis passing through the point of suspension will be?

Answer : If a suspended body is struck at the center of percussion, then the pressure on die axis passing through the point of suspension will be zero.

Description : The weight of a body is due to

Answer : The weight of a body is due to gravitational force of attraction towards the center of the earth.

Description : A force acting on a body may?

Answer : A force acting on a body may introduce internal stresses, balance the other forces acting on it, retard its motion, change its motion.

Description : What parameters are to be considered when choosing a MOSFET?

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

Description : What is depletion type MOSFET?..........

Answer : Depletion MOSFET: Depletion MOSFET is a MOSFET in which the channel already exists. If we apply a voltage between drain and source then the drain current will flow even if the gate to source ... in figure. The drain current will be reduced as the gate to source voltage made more negative.

Description : What is enhancement MOSFET?...............

Answer : Enhancement MOSFET: There are two types of MOSFET one is enhancement MOSFET and second is depletion MOSFET. In enhancement MOSFET channel is created by applying threshold voltage between gate and source ... mode. The enhancement MOSFET will not conduct if the gate to source voltage is zero.

Description : what are the uses of MOSFET ?

Answer : Choppers and inverters and where high switching frequency is required.

Description : what is MOSFET ?

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.

Description : explain skin effect in copper interconnects. what are the various ways of reducing this effect?

Answer : Skin effect generally observed in ac conductor in transmission network, in skin the current flowing through outer layer of conductor is more than iner area of conductor thus we can say the ... for reducing this effect we can use boundel conductor or used hollow conductor for power transmission

Answer : The phenomenon of ionization of surrounding air around the conductor due to which luminous glow with hissing noise is rise is known as the corona effect.

Description : What is piezoelectric effect? Name two piezoelectric material.

Answer : piezoelectric effect: Piezoelectric effect can be stated as follows: when a pressure or force or vibration is applied to crystalline material like quartz crystal or crystalline substances, then ... crystal: Quartz crystal ,Rochelle salt 2) Synthetic crystals : Barium Titanate, Lithium sulphate

Description : What are the applications of Hall effect?

Answer : Hall effect transducer find application 8n instruments that measure magnetic field with small flux densities.

Description : what is skin effect?

Answer : Skin effect is occurs in conductor due to high frequency...as the frequency increases the resistance of conductor increases...skin effect means the current flow through the skin of conductor....as the ... dc current their will be no skin effect...I hope you understand basic concept of skin effect

Description : what is Ferranti effect?

Answer : Ferranti effect is the increase in voltage at receiving end than sending end means sending end voltage is less than receiving end . It is occurs in long transmission line when the line is lightly loaded or at no load.

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

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

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

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.

Description : State advantages of MOSFET.

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.

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

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.

Description : State the applications of MOSFET

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

Description : Compare JFET with MOSFET.

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

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

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.

Description : 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

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

Description : Explain switching model of MOSFET.

Description : Explain MOSFET gate drive circuit and totem pole configuration.

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.

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

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.

Description : Justify the statement. Antiparallel diode is connected across MOSFET.

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.

Description : parallel operation of MOSFET can be done more easily as compared to thyristor. why?

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.

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

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.

Description : Explain difference between enhancement MOSFET and depletion type MOSFET.

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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