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K

kixu_sudoku96

câu 21
UL=[TEX]\frac{U.ZL}{\sqrt{R^2+(ZL-ZC)^2}[/TEX]
\Leftrightarrow[TEX](UL^2-U^2)ZL^2[/TEX]-[TEX]2UL^2ZCZL[/TEX]+[TEX]UL^2(R^2+ZC^2)[/TEX]=0
ZL1+ZL2=[TEX]\frac{2UL^2ZC}{UL^2-U^2}[/TEX]
ZL1ZL2=[TEX]\frac{UL^2(R^2+ZC^2)}{UL^2-U^2}[/TEX]
ULmax\RightarrowZL=[TEX]\frac{R^2+ZC^2}{ZC}[/TEX]
ZL1ZL2=[TEX]\frac{(ZL1+ZL2)ZCZL}{2ZC}[/TEX]
L=[TEX]\frac{2L1L2}{L1+L2}[/TEX]
 
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