U=I1*R1=6*78=468 B
R=R1*(R2+R3)/(R1+R2+R3)=78*(25+48)/(78+25+48)=37.7 Ом (после замыкания ключа)
I2=U/R=468/37.7=12.4 A
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U=I1*R1=6*78=468 B
R=R1*(R2+R3)/(R1+R2+R3)=78*(25+48)/(78+25+48)=37.7 Ом (после замыкания ключа)
I2=U/R=468/37.7=12.4 A
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