A) \[{{n}^{2}}R\].
B) \[R/{{n}^{2}}\]
C) R/n
D) nR
Correct Answer: A
Solution :
Equivalent resistance of n resistances each of r ohm in parallel is given by \[\frac{1}{R}=\frac{1}{r}+\frac{1}{r}+.................+n\]times\[=\frac{n}{r}\] so,\[r=nR\] When these resistances are connected in series, effective resistance is \[R'=r+r+........+n\]times\[=nr\] \[\therefore \]\[R'=n\,(nR)={{n}^{2}}R\]You need to login to perform this action.
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