chiennguyen7721 chiennguyen7721
  • 24-11-2021
  • Physics
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Câu 9. Một dây dẫn đồng chất, tiết diện đều 20mm2 có dòng điện không đổi 12A đi qua. Tính trị trung bình mật độ dòng điện j ?

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top161 top161
  • 24-11-2021

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