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1
JEE Main 2023 (Online) 29th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
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If the height of transmitting and receiving antennas are 80 m each, the maximum line of sight distance will be:

Given : Earth's radius $$=6.4\times10^6$$ m

A
28 km
B
64 km
C
32 km
D
36 km
2
JEE Main 2023 (Online) 25th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
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Match List I with List II

List I List II
A. Troposphere I. Approximate 65-75 km over Earth's surface
B. E-Part of Stratosphere II. Approximate 300 km over Earth's surface
C. F$$_2$$-Part of Thermosphere III. Approximate 10 km over Earth's surface
D. D-Part of Stratosphere IV. Approximate 100 km over Earth's surface

Choose the correct answer from the options given below :

A
A-III, B-IV, C-II, D-I
B
A-III, B-II, C-I, D-IV
C
A-I, B-IV, C-III, D-II
D
A-I, B-II, C-IV, D-III
3
JEE Main 2023 (Online) 25th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
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A message signal of frequency 5 kHz is used to modulate a carrier signal of frequency 2 MHz. The bandwidth for amplitude modulation is :

A
10 kHz
B
2.5 kHz
C
20 kHz
D
5 kHz
4
JEE Main 2023 (Online) 24th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
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Match List I with List II

List-I
 List-II
A. AM Broadcast I. 88-108 MHz
B. FM Broadcast II. 540-1600 kHz
C. Television III. 3.7-4.2 GHz
D. Satellite Communication IV. 54MHz - 890MHz

Choose the correct answer from the options given below :

A
A-IV, B-III, C-I, D-II
B
A-II, B-I, C-IV, D-III
C
A-I, B-III, C-II, D-IV
D
A-II, B-III, C-I, D-IV
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