An amplitude modulated waves is represented by expression vm = 5(1 + 0.6 cos6280t) sin(211 × 104t) volts.

Question

An amplitude modulated waves is represented by expression

$v_m=5(1+0.6\cos6280t)\sin(211×10^4t) \text{ volts.}$

The minimum and maximum amplitudes of the amplitude modulated wave are, respectively:

(1) 5V, 8V

(2) $5\over2$V, 8V

(3) 3V, 5V

(4) $3\over2$V, 5V

Comments

Communication systems

Answer 1

Ans. (2) $5\over2$V, 8V

Sol. From Given Equation

 $\mu=0.6$

$A_m=\mu Ac$

${A_{max}+A_{min}\over2}=A_c=5\quad......(1)$

${A_{max}-A_{min}\over2}=3\quad\quad......(2)$

From Equation (1) + (2) 

$A_{max}=8$ 

From Equation (1) – (2) 

$A_{min}=2$

Comments

What is this and even there is no dislike option

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@ajink comments not have like or dislike button only question and answer has like or dislike buttons.

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Solution is correct but no option is right.

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In answer dislike button,
I think if Question has wrong option , you should verify and add your option  , thankyou

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Answers allready have like and dislike buttons.
This is good suggestion I will work on it.