改进后的实验器材纸条若干、薄塑料带一条,规格:纸条长十厘米左右,宽一厘米左右,塑料带长三十厘米左右,宽一厘米左右。实验方法把纸条平放在讲台上,用一只手捏住塑料带的一端(手一定要干),另一只手的大拇指和食指夹住塑料带从捏住端往另一端摩擦过去,力度适当。这样重复几次,然后将塑料带与纸条平行接近。接近到适当距离(约几厘米时),就会看到纸条自动跳上来。 After the improved experimental equipment, a number of paper strips and thin plastic tapes were used. Specifications: The paper strips are about ten centimeters long and about one centimeter wide. The plastic strips are about thirty centimeters long and about one centimeter wide. The experimental method lays a piece of paper on the podium and holds one end of the plastic band with one hand (the hand must be dry). The thumb and forefinger of the other hand grip the plastic band and rubbing it from the pinching end to the other end. , appropriate intensity. Repeat this several times and then parallel the plastic strips to the strips. Close to the appropriate distance (about a few centimeters), you will see the note automatically jump up.