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</html><description>&nbsp;In jurul unui conductor strabatut de curent exista un camp magnetic, ce exercita o forta asupra unui purtator de sarcina in miscare. La fel cum definim vectorul intensitatea campului electric E, ca fiind forta ce actioneaza asupra unitatii sarcinii de proba aflata in repaus, putem defini un alt camp, prin acea parte a fortei ce [&hellip;]</description></oembed>
