Timeline for In electrodynamics, why do we say $\mathbf J = \sigma \mathbf E$ and not $\mathbf J = \sigma (\mathbf E + \mathbf v \times \mathbf B)$?
Current License: CC BY-SA 4.0
6 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| May 9, 2019 at 16:26 | comment | added | ohneVal | Just have a look at this page en.wikipedia.org/wiki/Drift_velocity#Numerical_example all will be clear | |
| May 9, 2019 at 16:17 | comment | added | sangstar | At least close to it. Their mass is so small any force would produce enormous speeds. | |
| May 9, 2019 at 16:17 | answer | added | Othin | timeline score: 1 | |
| May 9, 2019 at 16:10 | comment | added | zeldredge | Why do you usually think of electrons as moving at light speed? | |
| May 9, 2019 at 14:40 | comment | added | jacob1729 | It can't be an approximation since its a definition of $\sigma$. I don't have any particular insight into why we define it like that beyond it seems to work out. | |
| May 9, 2019 at 14:37 | history | asked | sangstar | CC BY-SA 4.0 |