Current electricity

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

	Resistivity	Length	Diameter
Wire $X$	$ρ\rho$	$L$	$d$
Wire $Y$	$8ρ8\rho$	3L	$2 d$

The resistance of wire $X\,$ is $R$ .

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

$67R\frac{6}{7}R$

$76R\frac{7}{6}R$

$1213R\frac{12}{13}R$

$1312R\frac{13}{12}R$

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

	Resistivity	Length	Diameter
Wire $X$	$ρ\rho$	$L$	$d$
Wire $Y$	$8ρ8\rho$	3L	$2 d$

The resistance of wire $X\,$ is $R$ .

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

$67R\frac{6}{7}R$

$76R\frac{7}{6}R$

$1213R\frac{12}{13}R$

$1312R\frac{13}{12}R$

Current electricity Questions