利用电子秤探究影响电磁铁磁性强弱的因素

Exploring the influencing factors of the strength of electromagnet using electronic balance

设计了3种探究影响电磁铁磁性强弱的因素的方法,即软铁棒称量法、大头针计数法、小钢珠计数法.通过改变线圈匝数和电流大小,用电子秤称量出软铁棒和电磁铁吸引的大头针和小钢珠的质量来演示磁性强弱.

Three methods were designed to explore the influencing factors of the strength of elec tromagnet, namely the soft-iron bar weighing method, the pin counting method and the small steel ball counting pins or sma strength of ll method. By changing the number of turns of the coil or the current and weighing the steel balls attracted by the soft-iron bar or electromagnet by electronic balance, the e magnet was demonstrated.