Timeline for In electrodynamics, why do we say $\mathbf J = \sigma \mathbf E$ and not $\mathbf J = \sigma (\mathbf E + \mathbf v \times \mathbf B)$?
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| May 9, 2019 at 18:26 | comment | added | Othin | That's true, it always depends on what one want to measure, some effects just don't appear in certain approximations. Still, if the product of the relevant components of $B$ and $v_x$ is negligible, the hall potential will be small. If the charges move slowly, one may still observe a considerable potential if $B_z$ is big enough. | |
| May 9, 2019 at 17:08 | comment | added | lalala | It always depends what one wants to measure. Even for slow electrons the B term cannot be neglected for the Hall effect. | |
| May 9, 2019 at 16:17 | history | answered | Othin | CC BY-SA 4.0 |