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Physics, 04.09.2021 14:40 risolatziyovudd

một dây dẫn dài 100m được cuốn thành 1 cuộn dây. khi đặt 1 hiệu điện thế 60V vào 2 đầu cuộn dây này thì cường độ dòng điện qua nó là 125mA. Mỗi đoạn dây dài 1m sẽ có điện trở là

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một dây dẫn dài 100m được cuốn thành 1 cuộn dây. khi đặt 1 hiệu điện thế 60V vào 2 đầu cuộn dây này...
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