Electronic Devices [GATE (Graduate Aptitude Test in Engineering) Electronics]: Questions 39 - 42 of 161

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Passage

Read the passage and answer the following five questions:

The metal oxide semiconductor field effect transistor is the most important device for very large scale integrated circuits such as microprocessor and semiconductor memories. MOSFET is also becoming a power device. The principle of field effect transistor was first proposed by Dillen Field in 1930. The current in a MOSFET is transported by carriers of one polarity and is usually referred as unipolar device. The MOSFET is a member of the family of field effect transistors. It is fabricated with various semiconductors such as Si, GaAs and SiC with various insulators. The most important system is Si – SiO2 interface.

Question 39 (5 of 5 Based on Passage)

Electronic Devices
MOSFET, LED, Photo Diode and Solar Cell

Appeared in Year: 2016 (UGC-NET)

Question

MCQ▾

MOSFET is in equilibrium condition when

Choices

Choice (4)Response

a.

b.

Vgs = 0, Vds = 0

c.

Vgs ≠ 0, Vds = 0

d.

Both a. and b. are correct

Question 40

Electronic Devices
MOSFET, LED, Photo Diode and Solar Cell

Appeared in Year: 2018 (UGC-NET)

Question

Assertion-Reason▾

Assertion(Ꭺ)

The total capacitance of a MOS system is a series combination of insulator capacitance and semiconductor depletion layer capacitance. (December)

Reason(Ꭱ)

MOS Structure is an integral part of MOSFET.

Choices

Choice (4)Response

a.

Both Ꭺ and Ꭱ are false

b.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

c.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

d.

Ꭺ is true but Ꭱ is false

Question 41

Electronic Devices
P-N Junction,Zener Diode,BJT,MOS Capacitor

Appeared in Year: 2016 (UGC-NET)

Question

MCQ▾

The small signal model of a tunnel diode in negative resistance region is

Choices

Choice (4)Response

a.

The Nagative Resistance Choice -A

b.

The Nagative Resistance Choice -B

c.

The Nagative Resistance Choice -C

d.

The Nagative Resistance Choice -D

Question 42

Electronic Devices
MOSFET, LED, Photo Diode and Solar Cell

Appeared in Year: 2013 (UGC-NET)

Question

Assertion-Reason▾

Assertion(Ꭺ)

Stimulated emission is the key to the operation of LASER. (June)

Reason(Ꭱ)

An important property of LASER radiation is its coherence, under which is meant the correlation between the phases of oscillation at different positions in space and at various moments of time.

Choices

Choice (4)Response

a.

Ꭺ is false but Ꭱ is true

b.

Both Ꭺ and Ꭱ are false

c.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

d.

Ꭺ is true but Ꭱ is false

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