Question

Which of the following is the communication channel in case of radio communication?

• A. Free space
• B. Reception lines
• C. Transmission lines
• D. None of the above

Answer 1

The correct option is A Free space

Freespace propagation is used for the transmission of radio waves, television signals, cellular mobile radio and few applications of satellite communication. There is no channel known as reception lines. Transmission lines are generally used in communication purposes for power line transmission(<100 Hz).