Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard
  1. Home
  2. Engineering
  3. Need explanation for: - Communication Systems - JEE Main
# Engineering

In a line of sight radio communication a distance of about 50km is kept between the transmitting and receiving antennas. If the height of the receiving antennas 70 m, then the minimum height of the transmitting antenna should be: 

(Radius of the Earth= 6.4 \times 10^{6 }m)

  • Option 1)

    20 m

  • Option 2)

    51 m

  • Option 3)

    32 m

  • Option 4)

    40 m

 

Answers (1)
S solutionqc

R=6.4 \times 10^{6}

d=Range=50km

d=\sqrt{2Rh_{T}}+\sqrt{2Rh_{R}}

\Rightarrow 50 \times 10^{3}=\sqrt{2 \times 64 \times 10^{5} h_{T}}+\sqrt{2 \times 64 \times 10^{5} h_{R}}

\Rightarrow h_{T}=32m


Option 1)

20 m

Option 2)

51 m

Option 3)

32 m

Option 4)

40 m

Similar Questions

Latest Asked Questions

Most Viewed Questions

Preparation Products

Knockout JEE Main (Six Month Subscription)

- AI Coach Study Modules, - Unlimited Mock Tests, - Study Improvement Plan.

₹ 9999/- ₹ 8499/-
Buy Now
Knockout JEE Main (Nine Month Subscription)

- AI Coach Study Modules, - Unlimited Mock Tests, - Study Improvement Plan.

₹ 13999/- ₹ 12499/-
Buy Now
Test Series JEE Main 2024

Chapter/Subject/Full Mock Tests for JEE Main, Personalized Performance Report, Weakness Sheet, Complete Answer Key,.

₹ 7999/- ₹ 4999/-
Buy Now
JEE Main Rank Booster 2023

Booster and Kadha Video Lectures, Unlimited Full Mock Test, Adaptive Time Table, Faculty Support.

₹ 9999/- ₹ 6999/-
Buy Now
Knockout JEE Main (One Month Subscription)

Personalized AI Tutor and Adaptive Time Table, Self Study Material, Unlimited Mock Tests and Personalized Analysis Reports, Faculty Support.

₹ 7999/- ₹ 4999/-
Buy Now
Boost your Preparation for JEE Main 2021 with Personlized Coaching
Start Now
 
Exams
Articles
Questions