学生在学习苏科版初中物理九年级上册第十四章第一节“电阻”后,完成课本第2道习题有困难。该实验用玩具“验电球”为工具,检验常见物品的导电性。验电球可从网上购买,成本不高,实验安全简单。该实验可改成学生家庭实验,以培养学生学习物理的兴趣。 Students in the Suke version of junior high school physics ninth grade first chapter 14th chapter “resistance ”, the completion of the second textbook exercises difficult. The experiment with toys “test ball ” as a tool to test the conductivity of common items. Test the ball can be purchased from the Internet, the cost is not high, the experimental safe and simple. The experiment can be changed into student home experiments to develop students’ interest in learning physics.