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एक इलेक्ट्रॉन-पुँज में 5 माइक्रोऐम्पियर की धारा है। गणना कीजिए (i) प्रति सेकण्ड किसी बिंदु से कितने इलेक्ट्रॉन गुजरते है ? (ii) पुँज 50 सेमी की दूर कितना चुंबकीय क्षेत्र उत्पन्न करता है?

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Correct Answer - `(i) 3.125xx10^(13)`
`(ii) 2.0x x10^(-12)` न्यूटन/(ऐम्पियर-मीटर)

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