Which of the following statements is are correct 1 In telecommunication field copper ...........

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Which of the following statements is/are correct?

1. In telecommunication field copper wires carry signal in form of electrical current

2. In optical communication there is no flow of particles.

3. Optical fibres have higher signal loss compared to copper wires

Select the correct answer using codes given below

1 and 2

1 and 3

1 only

All of the above

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Explanation:

Second and Third statements are incorrect.
Second is incorrect because in optical communication, there is a flow of particles.
Third is incorrect because optical fibers have lower signal loss compared to copper wires. The fiber optic signal is made of light, very little signal loss occurs during transmission, and data can move at higher speeds and greater distances.
Optical communication is any type of communication in which light is used to carry the signal to the remote end, instead of electrical current. Optical communication relies on optical fibers to carry signals to their destinations.
Because of its numerous advantages over electrical transmission, optical fibers have largely replaced copper wire communications in core networks in the developed world.