GATE ECE topic:electronics PYQs & Answers — Page 64

Home
GATE
Electronics and Communication Engineering
Topics
topic:electronics

Questions 631–640 of 715. Imported answers require independent review unless marked reviewed.

Topic practice 715 questionsPage 64 of 72

A sinusoidal message signal is converted to a PCM signal using a uniform quantizer. The required signal-to-quantization noise ratio (SQN) at the output of the quantizer is 40 dB. The minimum number of bits per sample needed to achieve the desired SQN is __________

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

The voltage of an electromagnetic wave propagating in a coaxial cable with uniform characteristic impedance is

Volts, where

is the distance along the length of the cable in metres,

is the complex propagation constant, and

is the angular frequency. The absolute value of the attenuation in the cable in dB/metre is ________.

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Two conducting spheres S1 and S2 of radii

and

(

) respectively, are placed far apart and connected by a long, thin conducting wire, as shown in the figure.

Diagram for Electronics and Communication Engineering question 24

For some charge placed on this structure, the potential and surface electric field on S1 are

and

, and that on S2 are

and

, respectively. Then, which of the following is CORRECT?

Your answerChoose one option.

and

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Consider a wireless communication link between a transmitter and a receiver located in free space, with finite and strictly positive capacity. If the effective areas of the transmitter and the receiver antennas, and the distance between them are all doubled, and everything else remains unchanged, the maximum capacity of the wireless link

Your answerChoose one option.

increases by a factor of 2

decreases by a factor of 2

remains unchanged

decreases by a factor of

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

A two-wire transmission line terminates in a television set. The VSWR measured on the line is 5.8. The percentage of power that is reflected from the television set is __________

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Let

for real

. From among the following, choose the Taylor series approximation of

around

, which includes all powers of

less than or equal to 3.

Your answerChoose one option.

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

The values of the integrals

and

are

Your answerChoose one option.

same and equal to 0.5

same and equal to −0.5

0.5 and −0.5, respectively

−0.5 and 0.5, respectively

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

A three dimensional region

of finite volume is described by

where

are real. The volume of

(up to two decimal places) is ________.

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

An integral

over a counterclockwise circle

is given by

is defined as

, then the value of

Your answerChoose one option.

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Let

where

are real, and let

be the straight line segment from point

to point

. The value of

is ________.

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

GATE ECE topic:electronics PYQs

Question 23

Question 24

Question 24

Question 25

Question 25

Question 26

Question 26

Question 27

Question 27

Question 28