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एक क्षैतिज पावर लाइन 60 में ऐम्पियर की धारा पूर्व से पश्चिम की ओर प्रवाहित हो रही है 3 मीटर ऊर्ध्वाधर नीचे स्थित बिंदु पर चुम्बकीय क्षेत्र की तीव्रता कितनी होगी ?

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Correct Answer - `4xx10^(-6)` टेसला
`I=60A,d=3m`.
`B=(mu_(0))/(4pi)*(2I)/(d)=(10^(-7)xx2xx60)/(3)=4xx10^(-6)T`

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