The effective resistance of a parallel connection that consists of four wires of equal length, equal area of…

Let the resistance of each wire be $R$

Effective resistance in parallel combination,

$R_P=\frac{R}{4}$

$\Rightarrow R=4R_P$

$\Rightarrow R=4\times 0.25=1 \Omega$

Effective resistance is series combination,

$R_S=4R$

$\Rightarrow R_s=4\times 1=4 \Omega$