[vật lý 11] Cho em hỏi phần định luật Ôm.

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Help_physics

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M

messitorres9

Ta có: [TEX]I=\frac{U}{R_{td}}=\frac{3U}{8}[/TEX]
[TEX]I_1=\frac{U}{R_1}=\frac{U}{4}[/TEX]
\Rightarrow[TEX]\frac{I}{I_1}=\frac{3U}{8}:\frac{U}{4}[/TEX]
\Leftrightarrow[TEX]\frac{I}{I_1}=\frac{3}{2}[/TEX]
 
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