Previous year question hub

Analog Communications - Communications - Electronics & Communication Engineering Previous Year Questions

Practice Analog Communications - Communications - Electronics & Communication Engineering previous year questions organised from real papers, with year-wise coverage and clear topic navigation.

21Papers

17Years

45Questions

1Topics

Analog Communications question pattern

Every graph below is calculated only from this selection.

Questions by year

Compare question counts across years.

Difficulty distribution

How the classified questions are distributed by difficulty.

45questions

Medium 30 66.7%

Easy 13 28.9%

Hard 2 4.4%

Question type distribution

MCQ, numerical, multiple-select and other formats found in these papers.

45questions

MCQ 23 51.1%

Numerical Answer Type (NAT) 18 40%

Fill in the blanks 2 4.4%

MSQ 2 4.4%

Subject weightage

Top subjects by unique question coverage.

Electronics & Communication Engineering

45 Qs

Most asked topics

Top topics across the included previous year papers.

Communications

45 Qs

Subtopic coverage

Top subtopics inside this exact selection.

Analog Communications

45 Qs

Paper coverage

Question coverage for the most populated papers. Every active PYP paper remains listed below.

Electronics and Communication Engineering (EC) 2026

2 Qs

Electronics & Communication Engineering (EC) 2025

2 Qs

Electronics & Communication Engineering (EC) 2024

2 Qs

Electronics & Communication Engineering (EC) 2023

1 Qs

Electronics & Communication Engineering (EC) 2021

4 Qs

Electronics & Communication Engineering (EC) 2020

2 Qs

Electronics & Communication Engineering (EC) 2019

3 Qs

Electronics & Communication Engineering (EC) 2018

3 Qs

Electronics & Communication Engineering (EC) 2017

2 Qs

Electronics & Communication Engineering (EC) 2017 [Session 2]

2 Qs

Electronics & Communication Engineering (EC) 2017 [Session 1]

1 Qs

Electronics & Communication Engineering (EC) 2016 [Session 1]

5 Qs

Electronics & Communication Engineering (EC) 2016 [Session 3]

1 Qs

Electronics & Communication Engineering (EC) 2014 [Session 3]

1 Qs

Electronics & Communication Engineering (EC) 2014 [Session 4]

1 Qs

Electronics & Communication Engineering (EC) 2012

1 Qs

Electronics & Communication Engineering (EC) 2011

2 Qs

Electronics & Communication Engineering (EC) 2010

2 Qs

Electronics & Communication Engineering (EC) 2009

3 Qs

Electronics & Communication Engineering (EC) 2008

3 Qs

Electronics & Communication Engineering (EC) 2007

2 Qs

Included previous year papers

Newest papers appear first. Search these papers or sort by year and name.

Paper name	Year	PDF
Electronics and Communication Engineering (EC) 20262026 2 questions in this view	2026	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 20252025 2 questions in this view	2025	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 20242024 2 questions in this view	2024	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 20232023 1 questions in this view	2023	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 20212021 4 questions in this view	2021	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 20202020 2 questions in this view	2020	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 20192019 3 questions in this view	2019	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 20182018 3 questions in this view	2018	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 20172017 2 questions in this view	2017	ExamElite PDFs ExamElite solutions
Electronics & Communication Engineering (EC) 2017 [Session 1]2017 1 questions in this view	2017	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 2017 [Session 2]2017 2 questions in this view	2017	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 2016 [Session 1]2016 5 questions in this view	2016	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 2016 [Session 3]2016 1 questions in this view	2016	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 2014 [Session 3]2014 1 questions in this view	2014	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 2014 [Session 4]2014 1 questions in this view	2014	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 20122012 1 questions in this view	2012	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 20112011 2 questions in this view	2011	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 20102010 2 questions in this view	2010	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 20092009 3 questions in this view	2009	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 20082008 3 questions in this view	2008	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Electronics & Communication Engineering (EC) 20072007 2 questions in this view	2007	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download

All Analog Communications previous year questions

Practice every matching question in batches of 20, with every available option.

2007 · Electronics & Communication Engineering · Communications · Analog Communications

Electronics & Communication Engineering (EC) 2007

In the following scheme, if the spectrum \(M(f)\) of \(m(t)\) is as shown, then the spectrum \(Y(f)\) of \(y(t)\) will be

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2007 · Electronics & Communication Engineering · Communications · Analog Communications

Electronics & Communication Engineering (EC) 2007

In a GSM system, 8 channels can co-exist in 200 kHz bandwidth using TDMA. A GSM based cellular operator is allocated 5 MHz bandwidth. Assuming a frequency reuse factor of \(\frac{1}{5}\), i.e. a five-cell repeat pattern, the maximum number of simultaneous channels that can exist in one cell is

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2008 · Electronics & Communication Engineering · Communications · Analog Communications

Electronics & Communication Engineering (EC) 2008

Consider the amplitude modulated (AM) signal \(A_c \cos \omega_c t + 2\cos \omega_m t \cos \omega_c t\). For demodulating the signal using envelope detector, the minimum value of \(A_c\) should be

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2008 · Electronics & Communication Engineering · Communications · Analog Communications

Electronics & Communication Engineering (EC) 2008

Consider the frequency modulated signal 10 cos[2π × 10⁵t + 5 sin(2π × 1500)t + 7.5 sin(2π × 1000)t] with carrier frequency of 10⁵ Hz. The modulation index is

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2008 · Electronics & Communication Engineering · Communications · Analog Communications

Electronics & Communication Engineering (EC) 2008

The signal cos ω_ct + 0.5 cos ω_mt sin ω_ct is

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2009 · Electronics & Communication Engineering · Communications · Analog Communications

Electronics & Communication Engineering (EC) 2009

For a message signal \(m(t) = \cos(2\pi f_m t)\) and carrier of frequency \(f_c\), which of the following represents a single-side-band (SSB) signal?

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2009 · Electronics & Communication Engineering · Communications · Analog Communications

Electronics & Communication Engineering (EC) 2009

A message signal given by \[m(t) = \left(\frac{1}{2}\right)\cos \omega_1 t - \left(\frac{1}{2}\right)\sin \omega_2 t\] is amplitude-modulated with a carrier of frequency \(\omega_c\) to generate \[s(t) = [1 + m(t)]\cos \omega_c t\] What is the power efficiency achieved by this modulation scheme ?

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2009 · Electronics & Communication Engineering · Communications · Analog Communications

Electronics & Communication Engineering (EC) 2009

If the signal to quantization noise ratio required in uniformly quantizing the signal is 43.5 dB, the step size of the quantization is approximately

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2010 · Electronics & Communication Engineering · Communications · Analog Communications

Electronics & Communication Engineering (EC) 2010

Suppose that the modulating signal is \(m(t) = 2\cos(2π f_m t)\) and the carrier signal is \(x_c(t) = A_c \cos(2π f_c t)\). Which one of the following is a conventional AM signal without over-modulation?

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2010 · Electronics & Communication Engineering · Communications · Analog Communications

Electronics & Communication Engineering (EC) 2010

Consider an angle modulated signal \(x(t) = 6\cos[2π×10^6 t + 2\sin(8000π t) + 4\cos(8000π t)]\) V. The average power of x(t) is

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2011 · Electronics & Communication Engineering · Communications · Analog Communications

Electronics & Communication Engineering (EC) 2011

The Column-1 lists the attributes and the Column-2 lists the modulation systems. Match the attribute to the modulation system that best meets it.

Column-1	Column-2
P. Power efficient transmission of signals	I. Conventional AM
Q. Most bandwidth efficient transmission of voice signals	II. FM
R. Simplest receiver structure	III. VSB
S. Bandwidth efficient transmission of signals with significant dc component	IV. SSB-SC

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2011 · Electronics & Communication Engineering · Communications · Analog Communications

Electronics & Communication Engineering (EC) 2011

A message signal \(m(t) = \cos 2000\pi t + 4\cos 4000\pi t\) modulates the carrier \(c(t) = \cos 2\pi f_c t\) where \(f_c = 1\) MHz to produce an AM signal. For demodulating the generated AM signal using an envelope detector, the time constant RC of the detector circuit should satisfy

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2012 · Electronics & Communication Engineering · Communications · Analog Communications

Electronics & Communication Engineering (EC) 2012

The signal \( m(t) \) as shown is applied both to a phase modulator (with \( k_p \) as the phase constant) and a frequency modulator (with \( k_f \) as the frequency constant) having the same carrier frequency. The ratio \( k_p / k_f \) (in rad/Hz) for the same maximum phase deviation is

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2014 · Electronics & Communication Engineering · Communications · Analog Communications

Electronics & Communication Engineering (EC) 2014 [Session 3]

The phase response of a passband waveform at the receiver is given by
\( \phi(f) = -2\pi\alpha(f - f_c) - 2\pi\beta f_c \)
where \( f_c \) is the centre frequency, and \( \alpha \) and \( \beta \) are positive constants. The actual signal propagation delay from the transmitter to receiver is

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2014 · Electronics & Communication Engineering · Communications · Analog Communications

Electronics & Communication Engineering (EC) 2014 [Session 4]

In a double side-band (DSB) full carrier AM transmission system, if the modulation index is doubled, then the ratio of total sideband power to the carrier power increases by a factor of ________.

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2016 · Electronics & Communication Engineering · Communications · Analog Communications

Electronics & Communication Engineering (EC) 2016 [Session 1]

The block diagram of a frequency synthesizer consisting of a Phase Locked Loop (PLL) and a divide-by-\(N\) counter (comprising \( = 2, = 4, = 8, = 16 \) outputs) is sketched below. The synthesizer is excited with a 5 kHz signal (Input 1). The free-running frequency of the PLL is set to 20 kHz. Assume that the commutator switch makes contacts repeatedly in the order 1-2-3-4.
The corresponding frequencies synthesized are:

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2016 · Electronics & Communication Engineering · Communications · Analog Communications

Electronics & Communication Engineering (EC) 2016 [Session 1]

A superheterodyne receiver operates in the frequency range of 5 – 60 MHz. The intermediate frequency f_IF and local oscillator frequency f_LO are chosen such that f_IF ≤ f_LO. It is required that the image frequencies fall outside the 5 – 60 MHz band. The minimum required f_IF (in MHz) is ______

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2016 · Electronics & Communication Engineering · Communications · Analog Communications

Electronics & Communication Engineering (EC) 2016 [Session 1]

The amplitude of a sinusoidal carrier is modulated by a single sinusoid to obtain the amplitude modulated signal s(t) = 5 cos 1600πt + 20 cos 1800πt + 5 cos 2000πt. The value of the modulation index is ______

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2016 · Electronics & Communication Engineering · Communications · Analog Communications

Electronics & Communication Engineering (EC) 2016 [Session 1]

An analog pulse s(t) is transmitted over an additive white Gaussian noise (AWGN) channel. The received signal is r(t) = s(t) + n(t), where n(t) is additive white Gaussian noise with power spectral density \( \frac{N_0}{2} \). The received signal is passed through a filter with impulse response h(t). Let \( E_s \) and \( E_h \) denote the energies of the pulse s(t) and the filter h(t), respectively. When the signal-to-noise ratio (SNR) is maximized at the output of the filter (SNR_max), which of the following holds?

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2016 · Electronics & Communication Engineering · Communications · Analog Communications

Electronics & Communication Engineering (EC) 2016 [Session 1]

An antenna pointing in a certain direction has a noise temperature of 50 K. The ambient temperature is 290 K. The antenna is connected to a pre-amplifier that has a noise figure of 2 dB and an available gain of 40 dB over an effective bandwidth of 12 MHz. The effective input noise temperature \( T_e \) for the amplifier and the noise power \( P_{ao} \) at the output of the preamplifier, respectively, are

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Analog Communications - Communications - Electronics & Communication Engineering Previous Year Questions