丝绸摩擦过的玻璃棒带______电,是因为玻璃棒在摩擦的过程中______电子;电扇使用一段时间后,扇叶很容易沾上灰尘,这是因为扇叶转动过程中带上______,具有______的性质,所以灰尘被吸在扇叶上.
人气:103 ℃ 时间:2019-12-06 12:46:59
解答
丝绸摩擦过的玻璃棒带正电,是因为玻璃棒在摩擦的过程中失去电子,丝绸得到电子,用摩擦的办法使电子发生转移;
电扇使用一段时间后,扇叶很容易沾上灰尘,这是因为扇叶转动过程中带上电荷,具有吸引轻小物体的性质,所以灰尘被吸在扇叶上.
故答案为:正;失去;电荷;吸引轻小物体.
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