Audio signal cannot be transmitted because

Physics Communication System ( Not In Syllabus ) Communication MCQ (Single Correct)

The signal has more noise

The signal cannot be amplified for distance communication

The transmitting antenna length is very small to design

The transmitting antenna length is very large and impracticable (e) The signal is not a radio signal

Text Solution

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The correct answer is:

Following are the problems which are faced while transmitting audio signals directly.

(i) These signals are relatively of short range.

(ii) If every body started transmitting these low frequency signals directly, mutual interference will render all of them ineffective.

(iii) Size of antenna required for their efficient radiation would be larger i.e. about 75 km .

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