Astatic needles
id:
astatic-needles-299-6135499
title:
Astatic needles
text:
An astatic system comprises two equal and parallel magnetic needles, but with their polarities reversed. This arrangement protects the system from the influence of the terrestrial magnetic field, as the magnetisms of the two needles cancel each other out. Because of this phenomenon, astatic needles were often used in galvanometers.
brand slug:
wiki
category slug:
encyclopedia
description:
original url:
https://en.wikipedia.org/wiki/Astatic_needles
date created:
date modified:
2023-08-11T01:02:07Z
main entity:
{"identifier":"Q24717977","url":"https://www.wikidata.org/entity/Q24717977"}
image:
{"content_url":"https://upload.wikimedia.org/wikipedia/commons/a/ac/Galvanometro_astatico_di_tipo_Nobili_inv_1417_IF_38380.jpg","width":695,"height":1000}
fields total:
13
integrity:
14