直径Φ12mm长95mm强磁针,直径Φ12mm长95mm强磁棒 演示奥斯特实验,验证环形电流磁场方等实验,也可用于学生分组实验 strongmagneticrodwithΦ12mmand95mmlong strongbarmagnetneedleΦ12mmand95mmlong 1.UsestrongmagneticneedleorstrongmagneticrodwithΦ12mmdiameterand95mmlengthtodemonstrateOerstedexperiment 2.UseastrongbarmagnetwithdiameterΦ12mmand95mmlengthtodemonstratethemagneticfielddirectionofringcurrent有关演示视频请参阅网址www.mzhsx.com