Hướng dẫn: Dùng công thức:\(U_{13}\) = \(U_{12}\) + \(U_{23}\)
Giải:
a) \(U_{13}\) = \(U_{12}\) + \(U_{23}\) = 2,4V + 2,5V = 4,9V
b) \(U_{13}\) = \(U_{12}\) + \(U_{23}\)
Suy ra: \(U_{23}\)= \(U_{13}\) + \(U_{12}\) = 11,2V - 5,8V = 5,4V
c) \(U_{13}\)= \(U_{12}\) + \(U_{23}\)
Suy ra: \(U_{12}\) = \(U_{13}\) + \(U_{23}\) = 23,2V - 11,5V = 11,7V
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