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JEE Main 20169 AprilOnline
Exam
JEE Main
Year
2016
Date
9 April
Mode
Online
Subject
Physics
Chapter
Communication System

JEE Main 2016 · 9 April · Online · Physics · Communication System

An audio signal consists of two distinct sounds: one a human speech...

An audio signal consists of two distinct sounds: one a human speech signal in the frequency band of 200 Hz to 2700 Hz, while the other is a high frequency music signal in the frequency band of 10200 Hz to 15200 Hz. The ratio of the AM signal band width required to send both the signals together to the AM signal band width required to send just the human speech is:

Options

  1. A3
  2. B5
  3. C6
  4. D2

Correct answer

A. 3

Step-by-step solution

Band width for Music signal =15200−10200= 15200 - 10200 =5000Hz= 5000Hz

Band width for speech signal =2700−200=2500Hz= 2700 - 200 = 2500Hz

Band with for Both = 2500+5000=7500 Hz

Band with for Human speech =2500 Hz

Required Ratio =75002500=31= \dfrac{7500}{2500} = \dfrac{3}{1}
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