Zl=20 Zc=100tan\varphi an*tan\varphi mb =1 \Leftrightarrow (Zl*Zc)/R^2 =1 \Rightarrow R=20\sqrt{5} P=(U^2R)/(R^2+(Zl-Zc)^2)=500\sqrt{5}/21
Zl=20 Zc=100tanphi an*tanphi mb =1
suy ra Zl*Zc)/R^2 =1
suy ra R=20
can{5} P=(U^2R)/(R^2+(Zl-Zc)^2)=500
can{5}/21