Physics, 26.10.2021 01:30 erieannapickett12
R1 = 14 R2 = 16 R3 = 20 đạt vào hai đầu AB hiệu điện thế U thì cường độ dòng điện trong mạch chính là 0,7A
a) tính điện trở tương đương của mạch
b) tính hiệu điện thế ở hai đầu mỗi điện trở
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