Question

Two resistances $R_1=\left(100\underset{-}{+3}\right)$ ohms and $R_2=\left(200\underset{-}{+4}\right)$ ohms are connected in series. What is their equivalent resistance?

Answer 1

The equivalent resistance $\left(R_{eq}\right)$ of two resistances $R_1$ and $R_2$connected in seriesis: $R_{eq}=R_1+R_2$

$R_{eq}=\left({100}_{-}^{+}3\right)+\left({200}_{-}^{+}4\right)$

$R_{eq}={300}_{-}^{+}7ohms$

Therefore, their equivalent resistance is ${300}_{-}^{+}7$ ohms