Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Main 201816 AprilOnline
Exam
JEE Main
Year
2018
Date
16 April
Mode
Online
Subject
Physics
Chapter
Communication System

JEE Main 2018 · 16 April · Online · Physics · Communication System

A carrier wave of peak voltage 14V is used for transmitting a...

A carrier wave of peak voltage 14V14V is used for transmitting a message signal. The peak voltage of the modulating signal given to achieve a modulation index of 8080 % will be:

Options

  1. A22.4V22 .4 V
  2. B7V7V
  3. C11.2V11 .2 V
  4. D28V28V

Correct answer

C. 11.2V11 .2 V

Step-by-step solution

Modulation index,& m=AmAc⇒Am=0.8×14=11.2Vm = \dfrac{Am}{Ac}⇒ {A}_{m} = 0.8 \times 14= 11 .2 V
Practice Communication System on Quantrex Academy →

More from Communication System

The height of transmitting antenna is 180m and the height of the receiving antenna is… JEE Main 2023To radiate EM signal of wavelength λ with high efficiency, the antennas should have a… JEE Main 2023Match List-I with List-II List-I (Layer of atmosphere) List-II (Approximate height over… JEE Main 2023The amplitude of 15 ( 1000 ) is modulated by 10 ( 4 ) signal. The amplitude modulated… JEE Main 2023In satellite communication, the uplink frequency band used is: JEE Main 2023A transmitting antenna is kept on the surface of the earth. The minimum height of… JEE Main 2023A massage signal of frequency 3kHz is used to modulate a carrier signal of frequency 1 .… JEE Main 2023A carrier wave of amplitude 15V is modulated by a sinusoidal base band signal of… JEE Main 2023 Full Communication System list All JEE Main PYQs