Question
Question: An audio signal of 15 kHz frequency cannot be transmitted over long distances without modulation bec...
An audio signal of 15 kHz frequency cannot be transmitted over long distances without modulation because
A
The size of the required antenna would be at least 5 km which is not convenient.
B
The audio signal can not be transmitted through sky waves.
C
Effective power transmitted would be very low, if the size of the antenna is less than 5 km.
D
All of these
Answer
All of these
Explanation
Solution
: All of these