![homework and exercises - If the cross-sectional area of a wire doubles shouldn't the current also double? - Physics Stack Exchange homework and exercises - If the cross-sectional area of a wire doubles shouldn't the current also double? - Physics Stack Exchange](https://i.stack.imgur.com/Eqquh.png)
homework and exercises - If the cross-sectional area of a wire doubles shouldn't the current also double? - Physics Stack Exchange
8.nd the resistance of variable cross section wire having radious small section a large section b. And length of wire L. (resistivity of wire is given rho)
![A copper wire of 3 mm^2 cross sectional area carries a current of 5 ampere . The magnitude of the drifty velocity for the electrons in the wire, (Assume copper to be A copper wire of 3 mm^2 cross sectional area carries a current of 5 ampere . The magnitude of the drifty velocity for the electrons in the wire, (Assume copper to be](https://i.ytimg.com/vi/SkbzBGMrU44/maxresdefault.jpg)
A copper wire of 3 mm^2 cross sectional area carries a current of 5 ampere . The magnitude of the drifty velocity for the electrons in the wire, (Assume copper to be
Two wires are made of the same material and have the same volume. However wire 1 has cross - sectional area A and wire 2 has cross - sectional area 3A .
![Ratio of resistiviities of wires X and Y – effect of diameter on cross-sectional area | Evan's Space Ratio of resistiviities of wires X and Y – effect of diameter on cross-sectional area | Evan's Space](https://evantoh23.files.wordpress.com/2015/09/notes-page17.jpg)