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निम्न परिपथ में प्रतिरोध R का मान ज्ञात कीजिए यदि A और B के बीच तुल्य प्रतिरोध 4 ओम है ।
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`2 Omega` के दोनों प्रतिरोध समांतर क्रम में जुड़े है , यदि इनका तुल्य प्रतिरोध `R_(1)` हो , तो
`1/(R_(1))=1/2+1/2,` अतः `R_(1) = 1 Omega`
चूँकि `R_(1)` और R श्रेणी क्रम में जुड़े है ।,
अतः `R_(1)+R=4`
या `1+R = 4 `
` :. R = 3 ` ओम |

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