# 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

## Question ID - 50354 :- 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

3537

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

=94t) sin 2.5 x 10 5 t

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