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NTA Abhyas 2020
Exam
NTA Abhyas
Year
2020
Subject
Physics
Chapter
Communication System

NTA Abhyas 2020 · Physics · Communication System

If the area to be covered for TV telecast is doubled, then the...

If the area to be covered for TV telecast is doubled, then the height of transmitting antenna (TV tower) will have to be

Options

  1. ADoubled
  2. BHalved
  3. CQuadrupled
  4. D16 times

Correct answer

A. Doubled

Step-by-step solution

We know that

d=2hRed = \sqrt{2h{R}_{e}}

A=\pid2=2\pihReA = \pid^{2} = 2\pih{R}_{e}

area proportional to the height of the antenna

⇒A∝h⇒ A ∝ h
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