Khi mắc nối tiếp:
\(R_{tđ}=R_1+R_2=30+30=60\left(\Omega\right)\)
\(I=I_1=I_2=\dfrac{U}{R_{tđ}}=\dfrac{15}{60}=0,25\left(A\right)\)
Khi mắc song song:
\(U=U_1=U_2=15V\)
\(\left\{{}\begin{matrix}I_1=\dfrac{U_1}{R_1}=\dfrac{15}{30}=0,5\left(A\right)\\I_2=\dfrac{U_2}{R_2}=\dfrac{15}{30}=0,5\left(A\right)\end{matrix}\right.\)
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