3 cm2 अनुप्रस्थ काट के क्षेत्रफल और 20 cm व्यास की वृत्ताकार लोहे की रिंग पर 500 फेरों की एक कुंडली लपेटी गई है और इसमें 2.09 A धारा प्रवाहित होने पर 0.5 mWb का चुंबकीय अभिबाह (फ्लक्स) उत्पन्न होता है। पदार्थ की चुंबकशीलता ज्ञात कीजिए ।

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MPPGCL JE Electrical 19 March 2019 Shift 2 Official Paper
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  1. 8.334
  2. 83.34
  3. 833.34
  4. 8333.34

Answer (Detailed Solution Below)

Option 2 : 83.34
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संप्रत्यय

पदार्थ की पारगम्यता निम्न द्वारा दी जाती है:

\(μ={B\over H}\)

जहाँ, B = चुंबकीय फ्लक्स घनत्व

H = चुंबकीय क्षेत्र की तीव्रता

परिकलन

दिया गया है, d = 20 cm

N = 500

A = 3 cm2

ϕ = 0.5 mWb

I = 2.09 A

\(H={Ni\over l}={500× 2.09\over \pi × 0.2}=1663.2\space A/m\)

\(B={\phi \over A}={0.5× 10^{-3}\over 3× 10^{-4}}=1.667 \space T\)

\(μ={B\over H}={1.667\over 1663.2}\)

μ = 83.34 x 10-6 H/m

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