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QJEEM19Ph21e9: JEE Main 2019 Physics - Class 12 JEEM19Ph21e9 Solution: A TV transmission tower has a height of 140 m and the height of …

A TV transmission tower has a height of 140 m and the height of the receiving antenna is 40 m. What is the maximum distance upto which signals can be broadcasted from this tower is LOS (Line of Sight) mode ? (Given : radius of earth = 6.4 × 106 m).

Multiple Choice Options

  • A 40 km
  • B 65 km
  • C 48 km
  • D 80 km

Step-by-Step Verified Solution

Maximum distance upto which signal can be broadcasted is

dmax = 2RhT+2RhR

where hT and hR are heights of transmitter tower and height of reserver respectively. Putting all values -

dmax = 2×6.4×106[104+40]

on solving, dmax = 65 km

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