परतबंदी और अवरोधन के कारण प्रभावी कोर क्षेत्र में शुद्ध न्यूनीकरण लगभग ___ है।

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ALP CBT 2 Electrician Previous Paper: Held on 22 Jan 2019 Shift 3
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  1. 20%
  2. 40%
  3. 30%
  4. 10%

Answer (Detailed Solution Below)

Option 4 : 10%
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  • ट्रांसफॉर्मर में भँवर धारा हानि को कम करने के लिए परतदार लोहे के कोर का उपयोग किया जाता है, क्योंकि परतबंदी एक दूसरे से अवरोधित रहती हैं।
  • परतबंदी की प्रक्रिया में वार्निश, संसेचित कागज इत्यादि जैसे अवरोधन पदार्थो को एकसाथ रखकर कोर को पतली परतों में विभाजित किया जाता है।
  • परतबंदी के कारण प्रत्येक परत का प्रभावी अनुप्रस्थ-काट क्षेत्रफल 10% के कोटि में कम होता है और इसलिए प्रभावी प्रतिरोध बढ़ता है।
  • चूँकि प्रभावी प्रतिरोध बढ़ता है, इसलिए भँवर धारा हानि कम होगी।
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