Question

Помогите решить! Физика

Answer 1

Ответ:

Объяснение:

$R_{12} = \dfrac{R_1R_2}{R_1 + R_2} = \dfrac{8*6}{8+6} = 3.43~Om\\R_{13} = R_{12} + R_3 = 3.43+2=5.43~Om\\R = \dfrac{1}{\dfrac{1}{R_{13}}+\dfrac{1}{R_4}+\dfrac{1}{R_5}} = \dfrac{1}{\dfrac{1}{5.43}+\dfrac{1}{12}+\dfrac{1}{6}} = 2.3~Om\\I = \dfrac{U}{R} = \dfrac{18}{2.3} = 7.83~A$