TS EAMCET · Physics · Nuclear Physics
The transmitting antenna placed at the top of a tower has a height of from the ground. The distance between receiving and transmitting antennas is and the radius of earth is . The minimum height (in at which the receiving antenna is to be placed for satisfactory communication in mode, is
- A
- B
- C
- D
Answer & Solution
Correct Answer
(C)
Step-by-step Solution
Detailed explanation
Recall the formula of maximum distance between transmitting and receiving antenna, d=2 RhT+2 RhR 40=2×6400×45×10-3+2×6400×hR 40=24+2×6400×hR 256=2×6400×hR hR=2562×6400=20×10-3 km=20 m
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