This chapter is currently out of syllabus
1
JEE Main 2023 (Online) 31st January Morning Shift
+4
-1
Out of Syllabus

The amplitude of $$15 \sin (1000 \pi \mathrm{t})$$ is modulated by $$10 \sin (4 \pi \mathrm{t})$$ signal. The amplitude modulated signal contains frequency (ies) of

A. $$500 \mathrm{~Hz}$$

B. $$2 \mathrm{~Hz}$$

C. $$250 \mathrm{~Hz}$$

D. $$498 \mathrm{~Hz}$$

E. $$502 \mathrm{~Hz}$$

Choose the correct answer from the options given below:

A
B only
B
A only
C
A, D and E only
D
A and B only
2
JEE Main 2023 (Online) 30th January Evening Shift
+4
-1
Out of Syllabus
Match List I with List II:

List I List II
A. Attenuation I. Combination of a receiver and transmitter.
B. Transducer II. process of retrieval of information from the carrier wave at receiver
C. Demodulation III. converts one form of energy into another
D. quad Repeater IV. Loss of strength of a signal while propagating through a medium.

Choose the correct answer from the options given below:

A
A-I, B-II, C-III, D-IV
B
A-IV, B-III, C-I, D-II
C
A-IV, B-III, C-II, D-I
D
A-II, B-III, C-IV, D-I
3
JEE Main 2023 (Online) 30th January Morning Shift
+4
-1
Out of Syllabus

A sinusoidal carrier voltage is amplitude modulated. The resultant amplitude modulated wave has maximum and minimum amplitude of $$120 \mathrm{~V}$$ and $$80 \mathrm{~V}$$ respectively. The amplitude of each sideband is :

A
15 V
B
20 V
C
5 V
D
10 V
4
JEE Main 2023 (Online) 29th January Evening Shift
+4
-1
Out of Syllabus

The modulation index for an A.M. wave having maximum and minimum peak-to-peak voltages of 14 mV and 6 mV respectively is-

A
0.4
B
0.6
C
1.4
D
0.2
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