Telephone communication is the example of transmission of signals through
A electric wires
B. optical fibres
C. electromagnetic waves
D. All
Answers
Explanation:
The signals in telephone communication are transmitted through aerial wires, cables, radio relay systems, and satellites. ... A combined type of electrical communication—video-telephone service (seeVIDEOTELEPHONE)—is possible using high-frequency cables and radio relay systems.
Answer:
C. electromagnetic wires is used to transmit the signals in telephone communication.
Explanation:
We always wonder if we call a person and talk through the phone, we instantly receive an answer to the question we asked, but we don't recognise there is a time lag between our conversations(although there will be). So, this is possible because of the electromagnetic waves which travel at the speed of light c = 299 792 458 m / s.(i.e. if we go at light speed we can travel around the Earth 7.48 times around the equator) used in the telephone communication to send signals from one place to another.
Therefore, (C). electromagnetic waves is the correct option.
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