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tranminhtrungttnavd
2 năm trước
a, Vẽ sơ đồ mạch điện gồm ampe kế, nguồn điện 2 pin, dây dẫn, 2 bóng đèn mắc nối tiếp, khóa K, vôn kế đo đèn 2 b, Biết hiệu điện thế của 2 đầu nguồn là 24V, hiệu điện thế của 2 đầu đèn 2 là 17 V. Tìm hiệu điện thế của 2 đầu bóng đèn 1
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