Electronic Devices [GATE (Graduate Aptitude Test in Engineering) Electronics]: Questions 21 - 25 of 161

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Question 21

Electronic Devices
MOSFET, LED, Photo Diode and Solar Cell

Appeared in Year: 2016 (UGC-NET)

Question

MCQ▾

In JFET the Trans conductance can be expressed as

Choices

Choice (4)Response

a.

b.

c.

d.

Question 22

Electronic Devices
MOSFET, LED, Photo Diode and Solar Cell

Appeared in Year: 2018 (UGC-NET)

Question

MCQ▾

Following are the light transmission mediums: (December)

i. Glass

ii. GaAs

iii. Diamond

iv. Water

Arrange their refractive index in descending order. The correct sequence in given by

Choices

Choice (4)Response

a.

(ii) , (iii) , (i) , (iv)

b.

(ii) , (i) , (iii) , (iv)

c.

(i) , (ii) , (iv) , (iii)

d.

(iv) , (ii) , (i) , (iii)

Question 23

Electronic Devices
Generation and Recombination of Carriers

Appeared in Year: 2018 (UGC-NET)

Question

MCQ▾

Arrange the following materials in ascending order of their diffusivity in Silicon. (December)

i. Li

ii. Na

iii. K

iv. Ag

Choices

Choice (4)Response

a.

(ii) , (i) , (iv) , (iii)

b.

(iii) , (ii) , (iv) , (i)

c.

(i) , (ii) , (iii) , (iv)

d.

(iv) , (iii) , (i) , (ii)

Question 24

Electronic Devices
MOSFET, LED, Photo Diode and Solar Cell

Appeared in Year: 2016 (UGC-NET)

Question

MCQ▾

An infrared LED is optically coupled to a photodiode. When LED is turned off, the reading on an ammeter in series with the reversed-biased photodiode will

Choices

Choice (4)Response

a.

Increase

b.

Fluctuate

c.

Not change

d.

Decrease

Question 25

Electronic Devices
MOSFET, LED, Photo Diode and Solar Cell

Appeared in Year: 2016 (UGC-NET)

Question

MCQ▾

Which of the below mentioned statements are correct with respect of semiconductor LASER?

(1) pn-junctions can be formed by using direct bandgap semiconductors.

(2) Emitted radiations should be monochromatic and coherent.

(3) Emitted radiations be monochromatic and all are in same phase.

(4) Emitted radiations should be monochromatic and spontaneous.

Choices

Choice (4)Response

a.

(1) & (2) are correct

b.

(1) , (2) & (4) are correct

c.

(1) , (2) & (3) are correct

d.

(1) , (3) & (4) are correct

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