[amp_mcq option1=”Telephone lines” option2=”Coaxial cable” option3=”Modem” option4=”Microwave system” correct=”option3″]<\/p>\n
The correct answer is (c). A modem is a device that modulates and demodulates signals, allowing data to be transmitted over a communication channel. It is not a transmission medium.<\/p>\n
A transmission medium is a physical path or channel for carrying a signal. It can be a wire, cable, fiber optic, or wireless medium.<\/p>\n
Telephone lines are a type of transmission medium that is used to carry voice and data signals. They are made up of copper wires that are insulated and twisted together.<\/p>\n
Coaxial cable is a type of transmission medium that is used to carry high-frequency signals. It is made up of a central conductor that is surrounded by a layer of insulation. The insulation is then surrounded by a shield of braided copper wires.<\/p>\n
Microwave systems are a type of transmission medium that is used to carry signals over long distances. They use microwaves, which are a type of electromagnetic radiation, to transmit signals.<\/p>\n
I hope this helps!<\/p>\n","protected":false},"excerpt":{"rendered":"
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