(2015•扬州)一个轻质小球靠近用毛皮摩擦过的橡胶棒时,它们相

2015扬州)一个轻质小球靠近用毛皮摩擦过的橡胶棒时,它们相互吸引,则小球(  )

    A.一定不带电          B 一定带负电               

C 一定带正电               D.可能不带电

答案

D解:用毛皮摩擦过的橡胶棒带负电,把一个轻质的小球靠近用毛皮摩擦过的橡胶棒时,它们相互吸引;

说明这个小球可能带与橡胶棒不同的电荷(正电荷),也可能不带电.

故选项ABC错误,选项D正确.

故选D

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