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royeu72
2 năm trước
Câu 4: a) Biết hiệu điện thế giữa hai đầu đèn Đ1 là U1 = 2,8V, hãy cho biết hiệu điện thế U2 giữa hai đầu đèn Đ2. b) Biết cường độ dòng điện chạy qua nguồn điện là I = 0,45A và chạy qua Đ2 là I2 = 0,22A. Tính cường độ dòng điện I1 chạy qua đèn Đ1.
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