Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
0.7 V / (2.2*10^(-8) Ohm*m* 70 m/((0.05mm)^2 * pi))
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random