Question

rezolvati problema pentru 4 rezistore paralele

R1=2 ohmi
R2=2 ohmi
R3=1 ohmi
R4=2 ohmi

Answer 1

 $\frac{1}{R}=\frac{1}{2}+\frac{1}{2}+\frac{^{2)}1}{1}+\frac{1}{2}=\frac{1+1+2+1}{2}=5\,/\,2 \,\Omega \;\\ \Rightarrow\;\;R=2/5=0,4\,\Omega$