An amplitude modulated signal is plotted below:-
Which one of the following best describes the above signal?
a.
(9 + sin (2.5
× 105 t)) sin (2
× 104t)V
b.
(9 + sin (4
× 104 t)) sin (5
× 105t)V
c.
(1 +9 sin (2 
× 104 t)) sin (2.5
× 105t)V
d.
(9 + sin (2
×104 t)) sin (2.5
× 105t)V
a.
(9 + sin (2.5× 105 t)) sin (2 × 104t)V
b.
(9 + sin (4 × 104 t)) sin (5 × 105t)V
c.
(1 +9 sin (2 × 104 t)) sin (2.5 × 105t)V
d.
(9 + sin (2 ×104 t)) sin (2.5 × 105t)V
Question ID - 50354 | SaraNextGen Top Answer An amplitude modulated signal is plotted below:-
Which one of the following best describes the above signal?
a.
(9 + sin (2.5× 105 t)) sin (2 × 104t)V
b.
(9 + sin (4 × 104 t)) sin (5 × 105t)V
c.
(1 +9 sin (2 × 104 t)) sin (2.5 × 105t)V
d.
(9 + sin (2 ×104 t)) sin (2.5 × 105t)V
An amplitude modulated signal is plotted below:-
Which one of the following best describes the above signal?
|
a. |
(9 + sin (2.5 |
b. |
(9 + sin (4 |
|
c. |
(1 +9 sin (2 |
d. |
(9 + sin (2 |
1 Answer
127 votes
Answer Key / Explanation : (d) -
Analysis of graph says
(1) Amplitude varies as 8 − 10 V or 9 ± 1
(2) Two time period as 100 
s (signal wave) & 8 
s (carrier wave)
Hence signal is 
=9
4t) sin 2.5
x 10 5 t
127 votes
Answer Link
127