Principles of communicationMedium
Question
In communication with help of antenna if height is double then the range covered which was initially r would become
Options
A.√2r
B.3r
C.4r
D.5r
Solution
Rang of antenna = r 
,
h =height of antenna,
R = radius of earth
if is doubled i.e., h = 2h, then new range
r′ =
⇒ r′ =
, h =height of antenna,
R = radius of earth
if is doubled i.e., h = 2h, then new range
r′ =
⇒ r′ =
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