A cylindrical conductor of length $l$ and uniform area of crosssection $A$ has resistance $R$. Another conductor of length $2l$ and resistance $R$ of the same material has area of cross section
A cylindrical conductor of length $l$ and uniform area of crosssection $A$ has resistance $R$. Another conductor of length $2l$ and resistance $R$ of the same material has area of cross section
- A
$A/2$
- B
$2A$
- C
$3A/2$
- D
$3A$
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