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甲乙丙三位同学围绕一道习题展开了激烈的争论。这道习题内容是:如果将绝缘导体A放入带负电荷的B物体附近,然后用手接触一下A导体,再移去B物体,问A导体应该带何种电荷? 甲同学首先发言,他说:“A导体应该带正电荷。因为A导体在电场中会发生静电感应现象,它的近端带正电荷,远端带负电荷,当我们用手接触A导体远端时,负电荷都跑到地球上去了,所以A导体上只剩下正电荷” “不对!”乙同学立即反驳道:“我用手去接触A导体近端,A导体上正电荷会跑到地球上去,最后A导体应该带负电荷!”
Three students A, B, and C launched a fierce debate around an exercise. The content of this exercise is: If the insulated conductor A is placed near a negatively charged B object, and then touches the A conductor with the hand, then removes the B object, and asks what kind of charge should the A conductor carry? A student first speaks, he Said: “A conductor should be positively charged. Because the A conductor in the electric field electrostatic induction phenomenon, its proximal positive charge, distal negative charge, when we touch the distal end of the A conductor, the negative charge Go to the earth, so the only positive charge on the A conductor is ”“ wrong! ” B students immediately retorted: “ I touch the proximal end of the A conductor by hand, the positive charge on the A conductor will run to the earth Up, the last A conductor should be negatively charged!”