1/R =1/r1 +1/r2 =1/20 +1/60 = (3+1)/60 =4/60=1/15
R =15 Ом
Сила тока I =U/R =15 В / 15 Ом =1 А
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1/R =1/r1 +1/r2 =1/20 +1/60 = (3+1)/60 =4/60=1/15
R =15 Ом
Сила тока I =U/R =15 В / 15 Ом =1 А
I=U/R= 15В/15Ом= 1 А