本题目来源于试卷: Electric Charge and Electric Field，类别为 IB物理学
[问答题]
When a charged ruler attracts -q6 ecuw hfm0d,i6nu- small piecesgeri(s8p) nm-u5a-x - )tlqcc of paper, sometimes a piece jumps quickly away after touching the ruler. Expla5(xp8m-i s- nle)ccqu) -rtgain.
参考答案:
The charged plastic ruler
has a negative charge residing on its surface.
That charge polarizes the charge in the neutral paper, producing a net
attractive force. When the piece of
paper then touches the ruler, the paper can get charged by contact with the
ruler, gaining a net negative charge.
Then, since like charges repel, the paper is repelled by the comb.
本题详细解析:
暂无
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