Question

Out of two wires P and a shown , a below which one resistance? has greater a Q Justify it.​

Answer 1

Answer:

Second one will have more resistance because

$R = \frac{pL}{a} \\ where \: R \: is \: resistance \\ p \: is \: density \: \\ L \: is \: length \: of \: conductor \\ a \: is \: area \: of \: cross \: section \\ \\ by \: using \: this \: formula \\ R_{1} = \frac{pl}{A} \\ R_{2} = \frac{pl}{ \frac{A}{2} } = 2\frac{pl}{A}$