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Physics, 23.10.2021 14:00 eweqwoewoji

Cần làm một biến trở có điện trở lớn nhất làm 30Ω bằng dây dẫn Nikêlin có điện trở suất là 0,40.10-6Ω.m và tiết diện 0,5mm2. Tính chiều dài của dây dẫn.

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Cần làm một biến trở có điện trở lớn nhất làm 30Ω bằng dây dẫn Nikêlin có điện trở suất là 0,40.10-6...

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