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JEE Main 202127 JulyMorning Shift
Exam
JEE Main
Year
2021
Date
27 July
Shift
Morning Shift
Subject
Physics
Chapter
Communication System

JEE Main 2021 · 27 July · Morning Shift · Physics · Communication System

The amplitude of upper and lower side bands of AM wave where a...

The amplitude of upper and lower side bands of AMAM wave where a carrier signal with frequency 11.21MHz,11 . 21MHz, peak voltage 15V15V is amplitude modulated by a 7.7kHz7 . 7kHz sine wave of 5V5V amplitude are a10V\dfrac{a}{10}V and b10V\dfrac{b}{10}V respectively. Then the value of ab\dfrac{a}{b} is_____.The amplitude of upper and lower side bands of AM wave where a carrier signal with frequency 11 . 21MHz, peak voltage

Correct answer

0

Step-by-step solution

In radio communications, a sideband is a band of frequencies higher than or lower than the carrier frequency, that are the result of the modulation process. The signal components above the carrier frequency constitute the upper sideband (USB), and those below the carrier frequency constitute the lower sideband (LSB).

The amplitude of upper and lower side bands of AM wave where a carrier signal with frequency 11 . 21MHz, peak voltage

a10=b10=μAC2\dfrac{a}{10} = \dfrac{b}{10} = \dfrac{\mu{A}_{C}}{2}
⇒ab=1⇒ \dfrac{a}{b} = 1

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