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Previous year question hub

Communication Systems - Modern Physics PYQ | Physics

Practice 20 previous-year MCQ PYQs on Communication Systems (Modern Physics) from AP EAPCET exams — 3 years, 17 unique questions, year-wise papers.

20Papers
3Years
17Questions
1Topics

Communication Systems question pattern

Every graph below is calculated only from this selection.

Questions by year

Year-wise coverage for Communication Systems. Each bar uses a separate theme-derived color.

Difficulty distribution

How the classified questions are distributed by difficulty.

Not classified 20 100%

Question type distribution

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

Multiple Choices 20 100%

Subject weightage

Top subjects by unique question coverage.

Physics
17 Qs

Most asked topics

Top topics across the included previous year papers.

Modern Physics
17 Qs

Subtopic coverage

Top subtopics inside this exact selection.

Communication Systems
17 Qs

Paper coverage

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

AP EAPCET 2025 21ST MAY EVENING SHIFT
1 Qs
AP EAPCET 2025 21ST MAY MORNING SHIFT
1 Qs
AP EAPCET 2025 22ND MAY EVENING SHIFT
1 Qs
AP EAPCET 2025 22ND MAY MORNING SHIFT
1 Qs
AP EAPCET 2025 23RD MAY EVENING SHIFT
1 Qs
AP EAPCET 2025 23RD MAY MORNING SHIFT
1 Qs
AP EAPCET 2025 24TH MAY MORNING SHIFT
1 Qs
AP EAPCET 2025 26TH MAY MORNING SHIFT
1 Qs
AP EAPCET 2025 27TH MAY MORNING SHIFT
1 Qs
AP EAPCET 2024 18TH MAY MORNING SHIFT
1 Qs
AP EAPCET 2024 20TH MAY EVENING SHIFT
1 Qs
AP EAPCET 2024 20TH MAY MORNING SHIFT
1 Qs
AP EAPCET 2024 21TH MAY MORNING SHIFT
1 Qs
AP EAPCET 2024 22TH MAY EVENING SHIFT
1 Qs
AP EAPCET 2024 22TH MAY MORNING SHIFT
1 Qs
AP EAPCET 2023 - 15th May Evening Shift
1 Qs
AP EAPCET 2023 - 15th May Evening Shift
1 Qs
AP EAPCET 2023 - 15th May Morning Shift
1 Qs
AP EAPCET 2023 - 15th May Morning Shift
1 Qs
AP EAPCET 2023 - 15th May Morning Shift
1 Qs

Included previous year papers

Newest papers appear first. Sort by year, question coverage or name.

PaperYear / sessionQuestions in this viewOpen
AP EAPCET 2025 21ST MAY EVENING SHIFT20251View paper
AP EAPCET 2025 21ST MAY MORNING SHIFT20251View paper
AP EAPCET 2025 22ND MAY EVENING SHIFT20251View paper
AP EAPCET 2025 22ND MAY MORNING SHIFT20251View paper
AP EAPCET 2025 23RD MAY EVENING SHIFT20251View paper
AP EAPCET 2025 23RD MAY MORNING SHIFT20251View paper
AP EAPCET 2025 24TH MAY MORNING SHIFT20251View paper
AP EAPCET 2025 26TH MAY MORNING SHIFT20251View paper
AP EAPCET 2025 27TH MAY MORNING SHIFT20251View paper
AP EAPCET 2024 18TH MAY MORNING SHIFT20241View paper
AP EAPCET 2024 20TH MAY EVENING SHIFT20241View paper
AP EAPCET 2024 20TH MAY MORNING SHIFT20241View paper
AP EAPCET 2024 21TH MAY MORNING SHIFT20241View paper
AP EAPCET 2024 22TH MAY EVENING SHIFT20241View paper
AP EAPCET 2024 22TH MAY MORNING SHIFT20241View paper
AP EAPCET 2023 - 15th May Evening Shift20231View paper
AP EAPCET 2023 - 15th May Evening Shift20231View paper
AP EAPCET 2023 - 15th May Morning Shift20231View paper
AP EAPCET 2023 - 15th May Morning Shift20231View paper
AP EAPCET 2023 - 15th May Morning Shift20231View paper

All Communication Systems previous year questions

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

1
2024 · Physics · Modern Physics · Communication Systems
AP EAPCET 2024 18TH MAY MORNING SHIFT
If the maximum and minimum voltages of an $A M$ wave are $V_{\max }$ and $V_{\min }$ respectively. Then, the modulation factor $m$ is
A
$\left(V_{\text {max }}+V_{\text {min }}\right) /\left(V_{\text {max }} \cdot V_{\text {min }}\right)$
B
$\left(V_{\text {max }}-V_{\text {mi }}\right) /\left(V_{\text {max }}+V_{\text {min }}\right)$
C
$2 V_{\text {max }}-V_{\text {min }} /\left(V_{\text {max }}+V_{\text {max }}\right)$
D
$\left(V_{\text {nes }}+V_{\text {min }}\right) /\left(V_{\text {max }}-V_{\text {man }}\right)$
Open complete paper
2
2024 · Physics · Modern Physics · Communication Systems
AP EAPCET 2024 20TH MAY EVENING SHIFT
In amplitude modulation, the amplitude of the carrier wave is 10 V and the amplitude of one of the side bands is 2 V . Then, the modulation index is
A
0.4
B
0,6
C
0.7
D
0.5
Open complete paper
3
2024 · Physics · Modern Physics · Communication Systems
AP EAPCET 2024 20TH MAY MORNING SHIFT
A carrier is simultaneously modulated by two sine waves with modulation indices of 0.3 and 0.4 , then the total modulation index is
A
1
B
0.12
C
0.5
D
0.7
Open complete paper
4
2024 · Physics · Modern Physics · Communication Systems
AP EAPCET 2024 21TH MAY MORNING SHIFT
An information signal of frequency 10 kHz is modulated with a carried wave of frequency $3.62 \mathrm{MHz}^{}$ The upper side and lower side frequencies are
A
3650 kHz and 3590 kHz
B
3620 kHz and 3600 kHz
C
3610 kHz and 3580 kHz
D
3600 kHz and 3620 kHz
Open complete paper
5
2024 · Physics · Modern Physics · Communication Systems
AP EAPCET 2024 22TH MAY EVENING SHIFT
Which one of the following is not classified as pulse modulation?
A
Pulse duration modulation
B
Pulse amplitude modulation
C
Pulse band modulation
D
Pulse position modulation
Open complete paper
6
2024 · Physics · Modern Physics · Communication Systems
AP EAPCET 2024 22TH MAY MORNING SHIFT

The maximum distance between the transmitting and receiving antennas for satisfactory communication in line of sight mode is 57.6 km . If the height of the receiving antenna is 80 m , the height of the transmitting antenna is (radius of earth $=6.4 \times 10^6 \mathrm{~m}$ )

A
28.8 m
B
51.2 m
C
25.6 m
D
14.4 m
Open complete paper
7
2025 · Physics · Modern Physics · Communication Systems
AP EAPCET 2025 21ST MAY MORNING SHIFT

If the sum of heights of transmitting and receiving antennas in line of sight of communication is ' $h$ ' then the height of receiving antenna, to have the range maximum is

A

$\frac{h}{2}$

B

$\frac{h}{4}$

C

2 h

D

$\frac{2 h}{3}$

Open complete paper
8
2025 · Physics · Modern Physics · Communication Systems
AP EAPCET 2025 21ST MAY EVENING SHIFT

In amplitude modulation of waves, the maximum amplitude is 30 mV and minimum amplitude is 5 mV , then the modulation index is

A

$\frac{4}{7}$

B

$\frac{3}{7}$

C

$\frac{5}{7}$

D

$\frac{2}{7}$

Open complete paper
9
2025 · Physics · Modern Physics · Communication Systems
AP EAPCET 2025 22ND MAY EVENING SHIFT

For transmitting a signal of frequency 1000 kHz , the minimum length of the antenna is

A

30 m

B

50 m

C

75 m

D

1500 m

Open complete paper
10
2025 · Physics · Modern Physics · Communication Systems
AP EAPCET 2025 22ND MAY MORNING SHIFT

If in an amplitude modulated wave, the maximum amplitude is 14 V and the modulation index is 0.4 , then the amplitude of the carrier wave is

A

4 V

B

8 V

C

12 V

D

10 V

Open complete paper
11
2025 · Physics · Modern Physics · Communication Systems
AP EAPCET 2025 23RD MAY EVENING SHIFT

Ionosphere acts as a reflector for the frequency range of

A

$3-30 \mathrm{kHz}$

B

$3-30 \mathrm{MHz}$

C

$3-30 \mathrm{~Hz}$

D

$3-30 \mathrm{GHz}$

Open complete paper
12
2025 · Physics · Modern Physics · Communication Systems
AP EAPCET 2025 23RD MAY MORNING SHIFT
If the maximum and minimum amplitudes of a modulated wave are 25 V and 5 V respectively, then the modulation index is
A

$\frac{1}{5}$

B

$\frac{1}{3}$

C

$\frac{3}{2}$

D

$\frac{2}{3}$

Open complete paper
13
2025 · Physics · Modern Physics · Communication Systems
AP EAPCET 2025 24TH MAY MORNING SHIFT

If the ratio of the maximum and minimum amplitudes of an amplitude modulated wave is $7: 3$, then the modulation index is

A

0.6

B

0.7

C

0.4

D

0.3

Open complete paper
14
2025 · Physics · Modern Physics · Communication Systems
AP EAPCET 2025 27TH MAY MORNING SHIFT

In amplitude modulation, if a message signal of 5 kHz 2 is modulated by a carrier wave of frequency 900 kHz , then the frequencies of the side bands are

A

$905 \mathrm{kHz}, 895 \mathrm{kHz}$

B

$900 \mathrm{kHz}, 800 \mathrm{kHz}$

C

$800 \mathrm{kHz}, 700 \mathrm{kHz}$

D

$1000 \mathrm{kHz}, 900 \mathrm{kHz}$

Open complete paper
15
2025 · Physics · Modern Physics · Communication Systems
AP EAPCET 2025 26TH MAY MORNING SHIFT

The heights of tansmitting and receiving antennas are respectively $\frac{1}{20000}$ and $\frac{1}{80000}$ times the radius of the

Earth. The maximum distance between these two antennas for satisfactory communication in line of sight mode is

(Radius of the Earth $=6.4 \times 10^6 \mathrm{~m}$ )

A

48 km

B

96 km

C

320 km

D

192 km

Open complete paper
16
2023 · Physics · Modern Physics · Communication Systems
AP EAPCET 2023 - 15th May Morning Shift

A carrier wave of peak voltage 15 V is used to transmit a message signal. If the modulation index is $60 \%$, then the peak of voltage of the modulating signal is

A

3 V

B

6 V

C

9 V

D

12 V

Open complete paper
17
2023 · Physics · Modern Physics · Communication Systems
AP EAPCET 2023 - 15th May Evening Shift

Bandwidth of an optical fibre is

A
more than 100 $\mathrm{GHz}$
B
less than 1 $\mathrm{MHz}$
C
less than 1 $\mathrm{GHz}$
D
less than 100 $\mathrm{kHz}$
Open complete paper