Resistances n, each of r ohm, when connected in parallel give an equivalent resistance of R ohm. If these resistances were connected in series, the combination would have a resistance in ohms, equal to

Answers (1)

Let resistance of each resistor = r 
In parallel Combination
\begin{array}{l} R=\frac{r}{n} \\ r=n R \end{array}
Resistance in series combination $=n r=n^{2} R$ 

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