AM सिग्नलच्या वाहकाची शक्ती 1,000 वॅट्स आहे. जर मॉड्युलेशनची टक्केवारी 80 असेल, तर वरच्या साइडबँडमधील पॉवर किती आहे?

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ALP CBT 2 Electronic Mechanic Previous Paper: Held on 21 Jan 2019 Shift 2
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  1. 800 वॅट्स
  2. 160 वॅट्स
  3. 320 वॅट्स
  4. 640 वॅट्स

Answer (Detailed Solution Below)

Option 2 : 160 वॅट्स
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Detailed Solution

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संकल्पना:

AM सिस्टमसाठी एकूण प्रसारित शक्ती याद्वारे दिली जाते:

\({P_t} = {P_c}\left( {1 + \frac{{{μ^2}}}{2}} \right)\)

Pc = वाहक शक्ती

μ = मॉड्यूलेशन इंडेक्स

वरील अभिव्यक्ती प्राप्त करण्यासाठी विस्तारित केली जाऊ शकते:

\({P_t} = {P_c} + P_c\frac{{{μ^2}}}{2}\)

एकूण शक्ती ही वाहक शक्ती आणि साइडबँड शक्तीची बेरीज आहे, म्हणजे.

\({P_s} = P_c\frac{{{μ^2}}}{2}\)

गणना:

दिलेले आहे: Pc = 1000 W आणि μ = 0.8.

आपण लिहू शकतो:

\({P_s} = P_c\frac{{{μ^2}}}{2}\)

\(= 1000 \times \frac{0.8^2}{2}\)

\(P_s=320~W\)

एकूण साइडबँड पॉवर = 320 W

वरच्या साइडबँडमधील पॉवर + लोअर साइड बँडमधील पॉवर = 320 W

वरच्या साइडबँडमधील पॉवर = लोअर साइडबँडमधील पॉवर = 160 W

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