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Physics, 18.06.2021 19:50 rathaditi4036

Khi đặt hiệu điện thế 15V vào 2 đầu dây dẫn thì dòng điện chạy qua nó có cường độ là 5mA. Muốn dòng điện chạy qua dây dẫn đó có cường độ giảm đi 3mA thì hiệu điện thế giữa hai đầu dây dẫn là bao nhiêu

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Khi đặt hiệu điện thế 15V vào 2 đầu dây dẫn thì dòng điện chạy qua nó có cường độ là 5mA. Muốn dòng...
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