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13问答网 > 架设电线时，两个电线杆之间的电线要略有下垂为什么

架设电线时，两个电线杆之间的电线要略有下垂为什么

2025-03-15 06:59:12

推荐回答（3个）

回答1：

两个电线杆之间的电线要略有下垂原因：
从物理学解释是因为物体会热胀冷缩,如果电线拉的太紧,当温度变化时，
就有可能导致电线绷断。
另外由于重力的原因也很难将电线拉成直线。
同样的道理，如楼房的伸缩缝。

回答2：

物体会冷缩热胀,如果电线拉的太紧,气候变化就可能使电线绷断.而且由于重力原因也很难将电线拉成直线.

回答3：

因为可能会绷紧，然而锻炼

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