This chapter is currently out of syllabus
1
JEE Main 2023 (Online) 25th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus

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
2
JEE Main 2023 (Online) 24th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus

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
3
JEE Main 2023 (Online) 24th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus

A modulating signal is a square wave, as shown in the figure.

If the carrier wave is given as $$\mathrm{c(t) = 2\sin(8\pi t)}$$ volts, the modulation index is :

A
$$\frac{1}{3}$$
B
1
C
$$\frac{1}{4}$$
D
$$\frac{1}{2}$$
4
JEE Main 2022 (Online) 29th July Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus

Find the modulation index of an AM wave having $$8 \mathrm{~V}$$ variation where maximum amplitude of the AM wave is $$9 \mathrm{~V}$$.

A
0.8
B
0.5
C
0.2
D
0.1
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