GATE EC MCQ, MSQ and NAT Questions

GATE EC MCQ, MSQ and NAT Questions: Students appearing for the GATE ECE exam 2025 must attempt various practice questions after completing syllabus. It’s important that you practically solve GATE EC MCQ, MSQ and NAT questions rather than just studying theoretically. Practicing with the GATE ECE model questions will help you analyze your preparation and find out your shortcomings whether you are forgetting formulae or not remembering the concepts. By solving the imposrant GATE EC MSQ questions you will improve your preparation. GATE 2025 exam for EC will have 3 sections, namely Engineering Mathematics, General Aptitude, and Core Electronics and Communication Engineering subjects. The General Aptitude part has 15 marks weightage and Engineering Mathematics and Core ECE subjects combined have 85 marks weightage in the GATE exam 2025. You can check out the GATE NAT questions for Electronics and Communication Engineering on this page.

Also Read: GATE 2025 Electronics and Communication Engineering (Feb 15): Exam Date, Syllabus, Question Papers, Pattern, Cutoff

Quick Links: 

Most Important GATE EC MCQ, MSQ and NAT Questions

Electronics and Communication Engineering (EC) is one of the most opted papers in the GATE examination which makes it tough to score the cutoff marks. However, with proper exam preparation and thorough practice of GATE EC MCQ, MSQ and NAT questions you can ace the exam with good scores. According to the GATE 2025 exam pattern, the paper will have NAT, MCQ, and MSQ questions. You must practice all sorts of questions to prepare well for the GATE ECE exam. Attempt the following GATE EC MCQ questions taken from the GATE previous year question papers. 

Network Theory

Q1- Norton's theorem states that a complex network connected to a load can be replaced with an equivalent impedance...

A- in series with a current source

B- in parallel with a voltage source

C- in series with a voltage source

D- in parallel with a current source

Answer- Option D is correct

Q2- For parallel RLC circuit, which one of the following statements is NOT correct?

A- The bandwidth of the circuit decreases if R is increased

B- The bandwidth of the circuit remains same if L is increased

C- At resonance, input impedance is a real quantity

D- At resonance, the magnitude of input impedance attains its minimum value.

Answer- Option D is correct

Control Systems

Q3- Match the following with List-1 with List-2

List-1

(a) Very low response at very high frequencies
(b) Overshoot
(c) Synchro-control transformer output

List-2

(1) Low pass systems
(2) Velocity damping
(3) Natural frequency
(4) Phase-sensitive modulation
(5) Damping ration

Answer- Correct answer is (a) - (1) , (b) - (5) , (c) - (4)

Q4- The Nyquist stability criterion and the Routh criterion both are powerful analysis tools for determining the stability of feedback controllers. Identify which of the following statements is FALSE.

A- The closed-loop frequency response for a unity feedback system cannot be obtained from the Nyquist plot.

B- The Routh criterion is not applicable in the condition of transport lag, which can be readily handled by the Nyquist criterion.

C- The general shape of the Nyquist plot is readily obtained from the Bode magnitude plot for all minimum-phase systems.

D- Both the criteria provide information relative to the stable gain range of the system.

Answer- Option A is correct 

Quick Links:

Electronic Devices and VLSI

Q5- In a semiconductor, if the Fermi energy level lies in the conduction band, then the semiconductor is known as:

A- degenerate n-type

B- degenerate p-type

C- non-degenerate n-type

D- non-degenerate p-type

Answer- Option A is correct

Q6- A region of negative differential resistance is observed in the current voltage characteristics of a silicon PN junction if:

A- Both the P-region and the N-region are heavily doped

B- The N-region is heavily doped compared to the P-region

C- The P-region is heavily doped compared to the N-region

D- An intrinsic silicon region is inserted between the P-region and the N-region

Answer- Option A is correct

Analog Circuit

Q7- Match the following:

GROUP-1

(A) Hartley
(B) Wein-bridge
(C) Crystal

GROUP-2

(1) Low frequency oscillator
(2) High frequency oscillator
(3) Stable frequency oscillator
(4) Relaxation oscillator
(5) Nagative Resistance oscillator

Answer- Correct answer is (A)-(2), (B)-(1), (C)-(3)

Q8- The Miller effect in the context of a Common Emitter amplifier explains

A- an increase in the low-frequency cutoff frequency

B- an increase in the high-frequency cutoff frequency

C- a decrease in the low-frequency cutoff frequency

D- a decrease in the high-frequency cutoff frequency

Answer- Option D is correct

Signals and Systems

Q9- Rectangular pulse of duration T is applied to a filter matched to this input. The output of the filter is a:

A- rectangular pulse of duration T.

B- rectangular pulse of duration 2T.

C- triangular pulse.

D- sine function.

Answer- Option C is correct

Q10- Consider the following statements for continuous-time linear time invariant (LTI) system.

I. There is no bounded input bounded output (BIBO) stable system with a pole in the right half of the complex plane.
II. There is no causal and BIBO stable system with a pole in the right half of the complex plane.

Which one among the following is correct?

A- Both I and  II are true

B- Both I and II are not true

C- Only I is true

D-  Only  II  is true

Answer- Option D is correct

Electronics and Communication Engineering papers will have numerical questions, so improve your Mathematics and learn the formulae. The GATE 2025 syllabus PDF for ECE also consists of theoretical topics that you must study thoroughly to understand the concepts. The best way to qualify the GATE ECE exam with flying colors is to practice questions from previous year papers, test series, sample papers, and mock tests. We wish you all the best for your exam!

Quick Links:

Related Articles

We hope that this post on the GATE MCQ for Electronics & Communication Engineering was helpful and informative.For more information stay tuned to CollegeDekho!