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500 क्षेत्रफल वाली कुंडली में 1000 फेरे हैं । इसे `4xx10^(-5)` T वाले चुंबकीय प्रेरण के लंबवत तल में रखा गया हैं । यदि इसे `180^(@)` से घुमाएँ , तो चुंबकीय फ्लक्स में परिवर्तन ज्ञात करें ।

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Correct Answer - `4 xx 10^(-3) Wb`
फ्लक्स में परिवर्तन
`phi_(B) = | phi _(f) - phi_(i)|`
` = |NAB cos 180 - NAB cos 0 ^(@) |`
= ` 2 NAB = 2xx( 1000) xx (500 xx 10^(-4)m^(2))(4xx10^(-5)T)`
= ` 4 xx 10^(-3)` Wb.]

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