R1=5 Ом R2=10 Ом P1=P2 r=?
I1²*R1=I2²*R2
I1=E/(R1+r) I2=E/(R2+r)
√R1/(R1+r)=√R2/(R2+r)
r=(R2*√R1-R1*√R2)/(√R2-√R1)=(√5*10-5*√10)/(√10-√5)=7.2 Ом
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R1=5 Ом R2=10 Ом P1=P2 r=?
I1²*R1=I2²*R2
I1=E/(R1+r) I2=E/(R2+r)
√R1/(R1+r)=√R2/(R2+r)
r=(R2*√R1-R1*√R2)/(√R2-√R1)=(√5*10-5*√10)/(√10-√5)=7.2 Ом
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