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calculeaza rezistenta echivalenta a gruparii in paralel daca ai n rezistoare cu rezistente electrice egale​

Răspuns :

[tex]\frac{1}{R_e}=\sum\limits^n_{k=1} {\frac{1}{R_k} }\\ R_1=R_2=...=R_n=R\\\frac{1}{R_e}=\sum\limits^n_{k=1} {\frac{1}{R_k} }=\frac{1}{R}+ \frac{1}{R}+...+ \frac{1}{R}=\frac{n}{R}=>R_e=\frac{R}{n}[/tex]