Объяснение:
U = I*R1 = 4*69 = 276 B
R= R1*(R2+R3) / (R1+R2+R3) = 69*(32+42) / (69+32+42) = 35.71 Ом
I2 = U / R = 276 / 35.7 == 7.73 А
Объяснение:
U = I*R1 = 4*69 = 276 B
R= R1*(R2+R3) / (R1+R2+R3) = 69*(32+42) / (69+32+42) = 35.71 Ом
I2 = U / R = 276 / 35.7 == 7.73 А