SaraNextGen Study App [2022-23]
Last Updated On 23-10-2022 - By Sara

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

1 Answer
5876 Votes
3537

Answer Key : (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  

=94t) sin 2.5 x 10 5 t



Next Question :

Which of the following statements about latent heat for a given substance is/are correct?

1. It is fixed at a given temperature.

2. It depends upon the temperature and volume.

3. it is independent of temperature and volume

4. It depends on the temperature but independent of volume.

Select the correct answer using the code given below:

(a)

2

(b)

1 and 3

(c)

4 only

(d)

1 and 4


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