Two Marks Questions with Answers

Two Marks Questions with Answers   

Q.1 Mention the operating modes of MOSFET.

AU : Dec.-10

Ans.

1. Depletion mode 2. Enhancement mode.

Q.2 Give any two differences between E-MOSFET and D-MOSFET. AU : Dec.-11

(Refer section 4.6.2)

Q.3 Which MOSFET is called as normally ON MOSFET and Normally OFF MOSFET ? Why ?

AU : May-11

Ans. : In depletion type MOSFET, maximum current I_DSS flows through the channel when V_GS = 0/ i-e- MOSFET is ON. Thus depletion type MOSFET is called Normally ON MOSFET.

For enhancement type MOSFET, the channel does not exists when V_GS = 0. Due to this I_D is almost zero and we can say that MOSFET is OFF. Thus enhancement type MOSFET is also called Normally OFF MOSFET.

Q.4 What is a MOSFET ? Name it's types.

(Refer section 4.1) AU: May-12

Q5 What is channel length modulation ?

(Refer section 4.3.4)

Q.6 State true or false: The transconductance Increases # channel length is reduced.

(Refer section 4.3)

Q.7 State the nonideal effects in MOSFET,

 (Refer section 4,4)

Q.8 What is body effect? (Refer section 4.4.2)

Q.9 What is subthreshold current ?

(Refer section 4.4.3)

Q.10 State the breakdown effects in MOSFET.

 (Refer section 4.4.4)

Q.11 Compare BJT, FET and MOSFET.

(Refer sections 4.6 and 4.7)

Q.12 Differenikate between JFET and MOSFET.

(Refer section 4.6.1)

Q.13 Define transductance of MOSFET. [Section 4.2.2] AU: Dec-17