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磁铁是一种很奇妙的东西,我们可以利用电流来制造电磁铁,吸起一些轻小的金属物品,一起来做做这个实验吧。【实验材料】铁棍(铁钉),曲别针,1号电池,双面胶,一根带绝缘线皮的电线。【实验步骤】1.把包有塑料皮的电线一圈圈整齐地缠绕在铁棍(铁钉)上面,铁棍(铁钉)前端要留出。再将电线两端的塑料皮剪掉(注意不要剪断电线),电线两头各留5厘米长的铜线。
Magnet is a wonderful thing, we can use the current to make the electromagnet, suck up some light metal objects, together to do this experiment. [Experimental materials] iron bars (nails), paper clips, No. 1 battery, double-sided tape, a wire with insulated wire. [Experimental procedure] 1. The plastic wrap wrapped in a circle neatly wrapped in iron bars (nails) above the iron bar (nail) front to stay out. Then cut off the plastic skin at both ends of the wire (be careful not to cut the wire), leaving 5 cm long copper wire on each end of the wire.