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Results tagged with electric-fields
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user 19841
For questions that utilize the concept of electric fields (commonly denoted by the letter E), or for questions whose answers likely involve electric fields. More specific than the [electricity] tag, as questions about the phenomenon & theory of electricity do not necessarily involve the discussion of fields.
5
votes
Relation between field strength and potential?
The field strength is the negative first derivative of the potential.
For example, in Cartesian coordinates, with electric potential $V = V(x,y,z)$, the electric field is:
$$
\boldsymbol E =-\nabla …
- 530
2
votes
Accepted
How can sawdust do this in an electric field?
Nonconductive materials like wood can get polarized by an electric field even though they don't conduct a current. Molecules within it can be polarized by an electric field even if they aren't willing …
- 530