NEET UG PHYSICS MCQ: COMMUNICATION SYSTEMS

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Consider telecommunication through optical fibres. Which of the following statements is no true?

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Correct option: B

Optical fibres are subjected to electro-magnetic interference from outside

Option B (Optical fibres are subjected to electro-magnetic interference from outside) is not true because optical fibers use light signals, which are immune to electromagnetic interference.

More Questions from COMMUNICATION SYSTEMS

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In the communication systems, AM is used for broadcasting because The maximum and minimum voltage of an amplitude modulated signal are

60 \mathrm{~V}

and

20 \mathrm{~V}

respectively. The percentage modulation index will be: Depth of modulation

\left( {{m_a}} \right)

in terms of

{{\text{E}}_{{\text{max}}}}\,{\text{and}}\,{{\text{E}}_{{\text{min}}}}

is The process of superimposing signal frequency (i.e., audio wave) on the carrier wave is known as The antenna current of an AM transmitter is 8 A when only the carrier is sent, but it increases to 8.93 A when the carrier is modulated by single sine wave. Find the percentage modulation. An audio signal of amplitude one half the carrier amplitude is used in amplitude modulation. Calculate the modulation index?