A) the signal has more noise f Thinking
B) the signal cannot be amplified for distance communication
C) the transmitting antenna length is very small to design
D) the transmitting antenna length is very large and impracticable
Correct Answer: B
Solution :
[b] As the audio frequencies range from \[20\text{ }Hz\]to \[20\text{ }kHz,\] therefore if they are transmitted directly into space, the length of the transmitting antenna required would be extremely large. Hence audio signal cannot be transmitted directly into space.
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