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思考:不用胶水、胶布等粘合的东西,报纸就能贴在墙上,而且还掉不下来。你知道这是为什么吗?实验材料:一支铅笔、一张报纸。实验步骤:1.展开报纸,把报纸平铺在墙上。2.用铅笔的侧面迅速地在报纸上摩擦几下后,你会发现报纸像粘在墙上一样掉不下来。3.掀起报纸的一角,然后松手,被掀起的角会被墙壁吸回去。4.把报纸慢慢地从墙上揭下来,注意听静电的声音。实验原理:1.摩擦铅笔,使报纸带电。
Reflections: Do not glue, tape and other bonded things, newspapers can be posted on the wall, but also can not fall down. Do you know why this is it? Materials: a pencil, a newspaper. Experimental steps: 1. Expand the newspaper, the newspaper tiled on the wall. 2. With the side of the pencil quickly rubbing the newspaper a few times, you will find the newspaper can not fall like a stick on the wall. 3. Set off a corner of the newspaper, and then let go, was set off the corner will be sucked back to the wall. 4. Slowly remove the newspaper from the wall, pay attention to listen to the voice of static electricity. Experimental principle: 1. Friction pencil, the newspaper charged.