![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
![Cross-sectional area [Encyclopedia Magnetica™ - magnetism, electromagnetism, fields, phenomena, devices, and more...] Cross-sectional area [Encyclopedia Magnetica™ - magnetism, electromagnetism, fields, phenomena, devices, and more...]](https://www.e-magnetica.pl/lib/exe/fetch.php/wire_area_e-m.png)
Cross-sectional area [Encyclopedia Magnetica™ - magnetism, electromagnetism, fields, phenomena, devices, and more...]
Calculate the electric field in a copper wire of cross sectional area 2mm^2 carrying a current of 2 ampere; given that resistivity of copper wire is 1.7×10^ 8 ohm m.
![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)