यदि एक टोरॉइड में बिस्मथ का क्रोड लगाया जाए तो इसके अंदर चुंबकीय क्षेत्र उस स्थिति की तुलना में ...

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यदि एक टोरॉइड में बिस्मथ का क्रोड लगाया जाए तो इसके अंदर चुंबकीय क्षेत्र उस स्थिति की तुलना में (किंचित) कम होगा या (किंचित) ज्यादा होगा, जबकि क्रोड खाली हो?
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