Q. 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
D) The transmitting antenna length is very large and impracticable
Explanation
(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 $75\ km$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.