茂(mao)名電(dian)(dian)磁鐵工作(zuo)原理(li)及茂(mao)名電(dian)(dian)磁鐵的應用
茂(mao)名(ming)電(dian)磁(ci)鐵(tie)的發明(ming)1822年,法國物理學家阿拉戈(ge)和呂薩克發現,當電(dian)流通(tong)過其(qi)中(zhong)有鐵(tie)塊的繞線時,它能(neng)使繞線中(zhong)的鐵(tie)塊磁(ci)化。這(zhe)(zhe)實(shi)際上(shang)是茂(mao)名(ming)電(dian)磁(ci)鐵(tie)原理的最初發現。1823年,斯特(te)金也(ye)做了一次類(lei)似的實(shi)驗:他(ta)在一根并非是磁(ci)鐵(tie)棒(bang)的U型鐵(tie)棒(bang)上(shang)繞了18圈銅(tong)裸線,當銅(tong)線與(yu)伏打電(dian)池(chi)接通(tong)時,繞在U型鐵(tie)棒(bang)上(shang)的銅(tong)線圈即產生(sheng)了密集的磁(ci)場(chang),這(zhe)(zhe)樣就使U型鐵(tie)棒(bang)變成(cheng)了一塊“茂(mao)名(ming)電(dian)磁(ci)鐵(tie)”。這(zhe)(zhe)種茂(mao)名(ming)電(dian)磁(ci)鐵(tie)上(shang)的磁(ci)能(neng)要比(bi)永磁(ci)能(neng)大(da)放多倍(bei),它能(neng)吸起比(bi)它重(zhong)20倍(bei)的鐵(tie)塊