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AIIMS 2011
Exam
AIIMS
Year
2011
Subject
Physics
Chapter
Communication System

AIIMS 2011 · Physics · Communication System

Voltage of modulating wave of 5 ~V with 10 MHz frequency was...

Voltage of modulating wave of 5 V5 \mathrm{~V} with 10MHz10 \mathrm{MHz} frequency was superimposed on carrier wave of frequency 20MHz20 \mathrm{MHz} and voltage 20 V20 \mathrm{~V} then the modulation index is

Options

  1. A0.25
  2. B1.25
  3. C2.43
  4. D64.0

Correct answer

A. 0.25

Step-by-step solution

Given, Am=5 V,Ac=20 VA_m=5 \mathrm{~V}, A_c=20 \mathrm{~V} ∴\therefore Modulation index, μ=AmAc=520=0.25\mu=\frac{A_m}{A_c}=\frac{5}{20}=0.25
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