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Physics NCERT Exemplar Solutions Class 12th Chapter FifteenCommunication SystemsClass 12thPhysics

Figure shows a communication system. What is the output power when input signal is of 1.01 mW? [Gain in dB= 10 log10 (P0 / P1)]

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10 months ago

This is a  Short Answer Type Questions as classified in NCERT Exemplar

Total distance = 5km and loss is 2 dB/km

So total loss = 5 (2)= 10 dB

Total gain in amplifier  10+20= 30dB and gain in signal is 20dB

So by the formula 20= 10log10 p o p i

log10 p o p i = 2

so po/pi= 102

so Po= Pi (100)= 101mW

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Physics NCERT Exemplar Solutions Class 12th Chapter Fifteen 2025

Physics NCERT Exemplar Solutions Class 12th Chapter Fifteen 2025

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