AP EAPCET 2024 - 21th May Morning Shift | Communication Systems Question 3 | Physics

An information signal of frequency 10 kHz is modulated with a carried wave of frequency $3.62 \mathrm{MHz}^{}$ The upper side and lower side frequencies are

3650 kHz and 3590 kHz

3620 kHz and 3600 kHz

3610 kHz and 3580 kHz

3600 kHz and 3620 kHz

AP EAPCET 2024 - 20th May Evening Shift

MCQ (Single Correct Answer)

-0

In amplitude modulation, the amplitude of the carrier wave is 10 V and the amplitude of one of the side bands is 2 V . Then, the modulation index is

0.4

0,6

0.7

0.5

AP EAPCET 2024 - 20th May Morning Shift

MCQ (Single Correct Answer)

-0

A carrier is simultaneously modulated by two sine waves with modulation indices of 0.3 and 0.4 , then the total modulation index is

0.12

0.5

0.7

AP EAPCET 2024 - 18th May Morning Shift

MCQ (Single Correct Answer)

-0

If the maximum and minimum voltages of an $A M$ wave are $V_{\max }$ and $V_{\min }$ respectively. Then, the modulation factor $m$ is

$\left(V_{\text {max }}+V_{\text {min }}\right) /\left(V_{\text {max }} \cdot V_{\text {min }}\right)$

$\left(V_{\text {max }}-V_{\text {mi }}\right) /\left(V_{\text {max }}+V_{\text {min }}\right)$

$2 V_{\text {max }}-V_{\text {min }} /\left(V_{\text {max }}+V_{\text {max }}\right)$

$\left(V_{\text {nes }}+V_{\text {min }}\right) /\left(V_{\text {max }}-V_{\text {man }}\right)$

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