[Avodah] running creates electricity

[Simon Montagu via Avodah]

On Mon, Oct 31, 2016 at 10:18 PM, Eli Turkel via Avodah <
avodah at lists.aishdas.org> wrote:

> From http://www.daat.ac.il/daat/english/journal/broyde_1.htm
> by Rabbis Broyde and Jachter
>
> D. Static Electricity
....
> Rabbi Eliezer Waldenberg (*Tzitz Eliezer* 7:10) rules leniently in this
> regard also. Rabbi Waldenberg Argues that these sparks last hardly a moment
> and have no impact whatsoever. In addition, there is no precedent for these
> sparks in the labor performed during the construction and functioning of
> the tabernacle, and hence there is no precedent whatsoever to classify the
> creation of these sparks as forbidden acts of labor...
...
> As distinct from static electricity the new "sweaters" have the ability to
> store this electricity and it is done intentionally. Hence R Waldenberg's
> heter that the static electricity lasts only a second doesn't hold....

R. Waldenberg's senif that "there is no precedent for these sparks in the
labor performed during the construction and functioning of the tabernacle"
presumably still applies to solar cells, triboelectric nanogenerators, and
elongated supercapacitors.