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phuongvanhothanh
2 năm trước
2. Cho đoạn mạch gồm (R 1 nối tiếp R 2 )//R 3 a) Biết R 1 = 40 ôm , R 2 = 10 ôm , R 3 = 12 ôm ,U= 6V.Tính Rtđ? Tính I 2 ? b) Biết R 1 = 8 ôm , R 2 = 12 ôm , R 3 = 2,2 ôm ,I= 1,5A.Tính U 3 ? Tính I 2 ? c) Biết U= 12V, U 1 = 8V, R 2 = 16 ôm , R 3 = 4 ôm .Tính I 2 ? Tính R 1 ?
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