What are the questions asked in GATE 2023 Electronics and Communication Engineering exam?

Complete set of questions from GATE 2023 ECE exam covering Network Theory, Analog Circuits, Digital Electronics, Signals and Systems, Control Systems, Communication Systems, Electromagnetic Theory, Electronic Devices, VLSI Design, Microprocessors, and more with detailed solutions.

Where can I download GATE 2023 Electronics and Communication question paper?

You can download the complete GATE 2023 Electronics and Communication Engineering question paper with solutions from ExamPrev. The PDF includes all questions with detailed explanations.

How many questions were in GATE 2023 ECE paper?

GATE 2023 Electronics and Communication Engineering paper consisted of 65 questions including MCQs, MSQs, and numerical answer type questions covering all major ECE topics.

Are solutions provided for GATE 2023 ECE questions?

Yes, detailed step-by-step solutions with explanations are provided for all questions from GATE 2023 Electronics and Communication Engineering paper.

What was the difficulty level of GATE 2023 ECE paper?

GATE 2023 ECE paper had moderate to difficult level with balanced coverage across all topics. The paper tested both conceptual understanding and application skills in electronics and communication engineering.

Electronics and Communication Gate 2023 Questions with Answer

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Ques 14 GATE 2023

Consider a narrow band signal, propagating in a lossless dielectric medium (ε_r = 4, μ_r = 1), with phase velocity v_p and group velocity v_g. Which of the following statements is true? (c is the velocity of light in vacuum.)

v_p > c, v_g > c

v_p < c, v_g > c

v_p > c, v_g < c

v_p < c, v_g < c

(d) is the correct answer.

Ques 15 GATE 2023

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

with reference to Z_o. Two lossless transmission line sections of electrical lengths θ₁ = βl₁ and θ₂ = βl₂ are added to the input and output ports for measurement purposes, respectively. The S-parameters [S''] of the resultant two port network is

(a) is the correct answer.

Ques 16 GATE 2023

The standing wave ratio on a 50 Ω 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. Z_L can be replaced by an equivalent length l_m and terminating resistance R_m of the same line. The value of R_m and l_m, respectively, are

R_m = 100 Ω, l_m = 20 cm

R_m = 25 Ω, l_m = 20 cm

R_m = 100 Ω, l_m = 5 cm

R_m = 25 Ω, l_m = 5 cm

(d) is the correct answer.

Ques 17 GATE 2023

The electric field of a plane electromagnetic wave is
E = a_xC_1xcos(ωt - βz) + a_yC_1ycos(ωt - βz + θ) V/m.
Which of the following combination(s) will give rise to a left handed elliptically polarized (LHEP) wave?

C_1x = 1, C_1y = 1, θ = π/4

C_1x = 2, C_1y = 1, θ = π/2

C_1x = 1, C_1y = 2, θ = 3π/2

C_1x = 2, C_1y = 1, θ = 3π/4

(c,d) is the correct answer.

Ques 18 GATE 2023

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

(b, c) is the correct answer.

Ques 19 GATE 2023

A transparent dielectric coating is applied to glass (ε_r = 4, μ_r = 1) to eliminate the reflection of red light (λ_o = 0.75 μm). The minimum thickness of the dielectric coating, in μm, that can be used is ____ (rounded off to two decimal places).

(0.12) is the correct answer.

Ques 20 GATE 2023

In a semiconductor, if the Fermi energy level lies in the conduction band, then the semiconductor is known as

degenerate n-type.

degenerate p-type.

non-degenerate n-type.

non-degenerate p-type.

(A) is the correct answer.

Ques 21 GATE 2023

For an intrinsic semiconductor at temperature T = 0 K, which of the following statements is true?

All energy states in the valence band are filled with electrons and all energy states in the conduction band are empty of electrons.

All energy states in the valence band are empty of electrons and all energy states in the conduction band are filled with electrons.

All energy states in the valence and conduction band are filled with holes.

All energy states in the valence and conduction band are filled with electrons.

(A) is the correct answer.

Ques 22 GATE 2023

For a MOS capacitor, V_fb and V_t are the flat-band voltage and the threshold voltage, respectively. The variation of the depletion width (W_dep) for varying gate voltage (V_g) is best represented by

(d) is the correct answer.

Ques 23 GATE 2023

In the circuit shown below, V_I and V₂ are bias voltages. Based on input and output impedances, the circuit behaves as a

voltage controlled voltage source.

voltage controlled current source.

current controlled voltage source.

current controlled current source.

(b) is the correct answer.

Ques 24 GATE 2023

The signal-to-noise ratio (SNR) of an ADC with a full-scale sinusoidal input is given to be 61.96 dB. The resolution of the ADC is ____ bits (rounded off to the nearest integer).

(11) is the correct answer.

Ques 25 GATE 2023

In the circuit shown below, the current i flowing through 200 Ω resistor is ____ mA (rounded off to two decimal places).

(0.25) is the correct answer.

Ques 26 GATE 2023

The h-parameters of a two port network are shown below. The condition for the maximum small signal voltage gain V_out/V_s is

h₁₁ = 0, h₁₂ = 0, h₂₁ = very high and h₂₂ = 0

h₁₁ = very high, h₁₂ = 0, h₂₁ = very high and h₂₂ = 0

h₁₁ = 0, h₁₂ = very high, h₂₁ = very high and h₂₂ = 0

h₁₁ = 0, h₁₂ = 0, h₂₁ = very high and h₂₂ = very high

(a) is the correct answer.

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