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An audio signal of 15 kHz can not be transmitted over long distances without modulation. Which of the following correctly explains this ? |
the least size of the required antenna will be at least 5 kms which is not convenient the audio signal cannot be transmitted through sky waves the size of the required antenna would be at least 20 km which is not convenient effective power transmitted would be very low if the size of the antenna is less than 5 km. |
the least size of the required antenna will be at least 5 kms which is not convenient |
An audio signal of 15kHz frequency cannot be transmitted over long distances without modulation because Low frequency waves make up audio frequency signals. As a result, because audio waves are absorbed by the atmosphere, they cannot be communicated via sky waves. |
