GATE ECE year:2023 PYQs & Answers — Page 6

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year:2023

Questions 51–60 of 65. Imported answers require independent review unless marked reviewed.

Topic practice 65 questionsPage 6 of 7

The S-parameters of a two port network is given as

with reference to

. Two lossless transmission line sections of electrical lengths

and

are added to the input and output ports for measurement purposes, respectively. The S-parameters

of the resultant two port network is

Diagram for Electronics and Communication Engineering question 51

Your answerChoose one option.

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The standing wave ratio on a 50

lossless transmission line terminated in an unknown load impedance is found to be 2.0. The distance between successive voltage minima is 30 cm and the first minimum is located at 10 cm from the load.

can be replaced by an equivalent length

and terminating resistance

of the same line. The value of

and

, respectively, are

Diagram for Electronics and Communication Engineering question 52

Your answerSelect all correct options. You can choose more than one.

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The electric field of a plane electromagnetic wave is

Which of the following combination(s) will give rise to a left handed elliptically polarized (LHE) wave?

Your answerSelect all correct options. You can choose more than one.

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The following circuit(s) representing a lumped element equivalent of an infinitesimal section of a transmission line is/are

Your answerSelect all correct options. You can choose more than one.

Diagram for Electronics and Communication Engineering question 54

Diagram for Electronics and Communication Engineering question 54 (figure 2)

Diagram for Electronics and Communication Engineering question 54 (figure 3)

Diagram for Electronics and Communication Engineering question 54 (figure 4)

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The value of the integral

over the region R, given in the figure

Diagram for Electronics and Communication Engineering question 55

, is ______ (rounded off to the nearest integer).

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In an extrinsic semiconductor, the hole concentration is given to be

where

is the intrinsic carrier concentration of

. The ratio of electron to hole mobility for equal hole and electron drift current is given as ______ (rounded off to two decimal places).

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The asymptotic magnitude Bode plot of a minimum phase system is shown in the figure

Diagram for Electronics and Communication Engineering question 57

. The transfer function of the system is

, where

and

are positive constants. The value of

is ______ (rounded off to the nearest integer).

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Let

and

is shown in the figure below. For

, the

is ____________________ (rounded off to the nearest integer).

Diagram for Electronics and Communication Engineering question 58

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Let

be a white Gaussian noise with power spectral density

W/Hz. If

is input to an LTI system with impulse response

. The average power of the system output is ________ W (rounded off to two decimal places).

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A transparent dielectric coating is applied to glass (

) to eliminate the reflection of red light (

). The minimum thickness of the dielectric coating, in

m, that can be used is ________ (rounded off to two decimal places).

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GATE ECE year:2023 PYQs

Question 51

Question 52

Question 53

Question 54

Question 55

Question 56

Question 57

Question 58

Question 59

Question 60