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A transmitting antenna of height h and ...

A transmitting antenna of height h and the receiving antenna of hight 45 m are separated by a distance of 40 km of satisfactory communicationin line of sight mode. Then the value of h is (given radius of earth is 6400 km)

A

15 m

B

20 m

C

30 m

D

25 m

Text Solution

Verified by Experts

The correct Answer is:
B
`d_M = sqrt(2Rh_T)+sqrt(2Rh_R)`
`implies 40 xx1000 = sqrt(2 xx 6.4 xx10^6 xxh)+ sqrt(2xx6.4 xx10^6xx45)`
`implies h = 20 m`
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