Physics - Current Electricity Question with Solution | TestHub

Two wires $A$ and $B$ are made up of the same material and have the same mass. Wire $A$ has radius of $2.0\mathrm{mm}$ and wire $B$ has radius of $4.0\mathrm{mm}$. The resistance of wire $B$ is $2\Omega$. The resistance of wire $A$ is _____$\Omega$.