Current electricity

The table below shows the resistivity, length, and diameter of two cylindrical wires, X and Y.

Wire	Resistivity	Length	Diameter
Wire X	$ρ\rho$	$L$	$d$
Wire Y	$2ρ2\rho$	$L$	$2 d$

The resistance of wire X is $R$ .

What is the total resistance when these two wires are connected in parallel?

$13R\frac{1}{3}R$

$12R\frac{1}{2}R$

$23R\frac{2}{3}R$

$32R\frac{3}{2}R$

The table below shows the resistivity, length, and diameter of two cylindrical wires, X and Y.

Wire	Resistivity	Length	Diameter
Wire X	$ρ\rho$	$L$	$d$
Wire Y	$2ρ2\rho$	$L$	$2 d$

The resistance of wire X is $R$ .

What is the total resistance when these two wires are connected in parallel?

$13R\frac{1}{3}R$

$12R\frac{1}{2}R$

$23R\frac{2}{3}R$

$32R\frac{3}{2}R$

Current electricity Questions