I ka manawa a me kahi i ʻike ʻia ai ka Magnet

ʻAʻole i haku ʻia ka magnet e ke kanaka, akā he mea magnetic maoli. Ua loaʻa i nā Helene kahiko a me nā Kina kekahi pōhaku magnetized maoli ma ke ʻano

Ua kapa ʻia ʻo "magnet". Hiki i kēia ʻano pōhaku ke omo i nā ʻāpana hao liʻiliʻi a kuhikuhi mau i ka ʻaoʻao hoʻokahi ma hope o ke koli ʻole ʻana. Ua hoʻohana ka poʻe hoʻokele mua i ka magnet i kā lākou panana mua e haʻi i ke ala ma ke kai. ʻO ka mea mua e ʻike a hoʻohana i nā mea hoʻokalakupua he Pākē, ʻo ia hoʻi, ʻo ka hana ʻana i ka "panana" me nā magnet kekahi o nā mea nui ʻehā a Kina.

I ka wā Kauaʻi, ua hōʻiliʻili nā kūpuna Kina i ka ʻike he nui e pili ana i kēia ʻano hana magnet. I ka ʻimi ʻana i ka hao hao, ʻike pinepine lākou i ka magnetite, ʻo ia hoʻi, ka magnetite (ka mea nui i haku ʻia me ka ferric oxide). Ua hoʻopaʻa ʻia kēia mau ʻike i ka wā ma mua. Ua hoʻopaʻa mua ʻia kēia mau mea i ʻike ʻia ma Guanzi: "kahi i loaʻa nā magnet ma ka mauna, aia ke gula a me ke keleawe ma lalo."

Ma hope o nā makahiki he mau makahiki o ka hoʻomohala ʻana, ua lilo ka magnet i mea ikaika i ko mākou ola. Ma ka hoʻohui ʻana i nā ʻāpana like ʻole, hiki ke hoʻokō ʻia ka hopena like me ka magnet, a hiki ke hoʻomaikaʻi ʻia ka ikaika magnetic. Ua ʻike ʻia nā magnet i hana ʻia e ke kanaka i ke kenekulia 18, akā ua lohi ka hana o ka hana ʻana i nā mea magnetic ikaika a hiki i ka hana ʻana oAlnicoi ka makahiki 1920. Ma hope iho,Mea hoʻoheheʻe ferriteua hana ʻia a hana ʻia i nā makahiki 1950 a ua hana ʻia nā mea magnet honua (me Neodymium a me Samarium Cobalt) i nā makahiki 1970. I kēia manawa, ua hoʻomohala wikiwiki ʻia ka ʻenehana magnetic, a ʻo nā mea magnetic ikaika hoʻi e hoʻolilo i nā ʻāpana i ka miniaturized.