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在教研组赵彦升老师的帮助下,我对初中物理课本第二册第46页的传导演示实验进行了改进,效果很好,介绍如下: 2.将铝片裁成半边弯曲半边直的片条(铜、铁片也行,但不如铝片易加工),宽约2厘米,长约34厘米,中间钻直径3.5毫米的小孔。另做一“■”形的铝片条,在短边一端也钻直径约3.5毫米的小孔,用螺丝将二者固定,加附图所示。“■”形的长边便于夹在铁架台上。
With the help of Zhao Yansheng, a teacher of the teaching and research group, I improved the conduction demonstration experiment on the 46th page of the second physics textbook for junior high school students. The results are very good. They are described as follows: 2. The aluminum sheet is cut into half-curved and straight-edge strips (copper , Iron is also OK, but not as easy as aluminum processing), about 2 cm wide, about 34 cm long, drilled 3.5 mm diameter hole in the middle. Another type of “”“ shaped aluminum strips, also drilled in the short side of the diameter of about 3.5 mm hole, with screws to fix the two, plus the picture shows. The long side of the ”■" shape facilitates clamping on the iron stand.