एक उपकरण के आउटपुट पर शक्ति स्तर 50 dBm है। तो निम्नलिखित विकल्पों से शक्ति के विशिष्ट मान की पहचान कीजिए।

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ALP CBT 2 Electronic Mechanic Previous Paper: Held on 21 Jan 2019 Shift 1
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  1. 1 W
  2. 100 W
  3. 500 W
  4. 10 W

Answer (Detailed Solution Below)

Option 2 : 100 W
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संकल्पना:

dBm एक निर्दिष्ट संदर्भ स्तर के संबंध में शक्ति स्तर के अनुपात को दर्शाने के लिए प्रयोग किये जाने वाले मापन की इकाई है।

dBm के साथ संदर्भ स्तर 1 mW (मिलीवाट) है।

dBm में शक्ति को निम्न रूप में व्यक्त किया गया है:

\(P(dBm)=10log_{10}(\frac{P}{1m})\)

P = dBm में व्यक्त की जाने वाली शक्ति

अनुप्रयोग:

दिया गया है dBm में आउटपुट शक्ति = 50

\(50=10log_{10}(\frac{P}{1m})\)

\(5=log_{10}(\frac{P}{1m})\)

दोनों पक्षों पर antilog लेने पर, हमें निम्न प्राप्त होता है:

\(10^5=\frac{P}{1m}\)

P = 105 × 10-3 W

P = 100 W

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