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एक छोटे दण्ड -चुम्बक का चुम्बकीय आघूर्ण `1 *25"ऐम्पियर-मीटर"^(2)` है । चुम्बक के अक्ष `0*5` पर मीटर की दूरी पर चुम्बकीय क्षेत्र की तीव्रता ज्ञात कीजिए ।

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Correct Answer - `2xx10^(-6)` टेसला ,
`M=1*25 "Am"^(2),r=0*5m`
अक्षीय स्थिति में ,
`B=(mu_(0))/(4pi)(2M)/(r^(3))`
`thereforeB=(10^(-7)xx2xx1*25)/((0*5)^(3))=2xx10^(-6)T`

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