Physics, 06.12.2021 14:00 sandrathompson7250
một đoạn mạch gồm 2 dây dẫn mắc nối tiếp, một dây bằng nikelin dài 3m có tiết diện 1mm2 và dây kia bằng sắt dài 8m có tiết diện 0,5mm2. hỏi khi cho dòng điện chạy qua đoạn mạch này trong cùng một thời gian thì dây nào tỏa nhiều nhiệt lượng hơn
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một đoạn mạch gồm 2 dây dẫn mắc nối tiếp, một dây bằng nikelin dài 3m có tiết diện 1mm2 và dây kia b...
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