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JEE MAIN 2020
02-09-20 S1
Question
An amplitude modulated wave is represented by the expression $\mathrm{v}_{\mathrm{m}}=5(1+0.6 \cos 6280 \mathrm{t}) \sin (211 \times 10^4 \mathrm{t}$ ) volts The minimum and maximum amplitudes of the amplitude modulated wave are, respectively
Select the correct option:
A
5 V, 8 V
B
$\frac{3}{2} \mathrm{~V}, 5 \mathrm{~V}$
C
3 V, 5 V
D
$\frac{5}{2} V, 8 \mathrm{~V}$
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
Solution
$\begin{aligned} & A_{\max }=A_c(1+\mu)=8 \mathrm{~V} \\ & A_{\operatorname{mim}}=A_c(1-\mu)=2 \mathrm{~V}\end{aligned}$
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