Intensity of electric field obtained at receiver antenna for a space wave propagation is
A
directly proportional to the perpendicular-distance from transmitter to antenna
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B
inversely proportional to the perpendicular-distance from transmitter to antenna
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C
directly proportional to the square perpendicular distance from transmitter to antenna
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D
inversely proportional to the square perpendicular distance from transmitter to antenna
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Solution
The correct option is D inversely proportional to the square perpendicular distance from transmitter to antenna The field strength due to space wave propagation is given by: |E|=(4πHhλd2)E0
where H,h are heights of transmitter and receiver respectively.
d is the perpendicular distance between transmitter and receiver
E0 is electric field emitted from transmitting antenna