NEET UG PHYSICS MCQ: COMMUNICATION SYSTEMS

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Analyzing +4 | -1

Assertion: Amplitude modulation shows more interference than frequency modulation with noise.
Reason: Interference is function of amplitude of modulation wave with carrier wave.

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Correct option: B

If both Assertion and Reason are true, but Reason is not the correct explanation of Assertion

Option B is correct because both the assertion and the reason are true, but the reason does not fully explain the assertion.

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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?