Audio signal cannot be transmitted because - Vidyadip

MCQ

Audio signal cannot be transmitted because

A
The signal has more noise
B
The signal cannot be amplified for distance communication
C
The transmitting antenna length is very small to design
✓
The transmitting antenna length is very large and impracticable

✓

Answer

Correct option: D.

The transmitting antenna length is very large and impracticable

d
(d) 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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