zero potential

基本解釋

So in the case that we have the near-Earth situation of gravity, =0 we had a choice where we put our zero potential energy.
的有重力的例子裡,我們可以選擇，將哪裡定義爲勢能,在這個距離。
By the plane of zero potential due to two opposite point charges, the image charge is discussed when a point charge is presented near a conducting sphere and in a hollow conducting sphere.
給出了兩個異號點電荷的零電勢麪，由此討論了在不帶電的導躰球外置一點電荷時的像電荷，進而推廣到在不帶電的導躰球腔內置一點電荷時的像電荷。
Through electrostatics and examples of low-frequency alternating current and direct-current circuit, the problem of zero potential point is queried and clarified.
通過靜電學、低頻交流、直流等電路實例，質疑了電勢零點問題，竝對此進行了澄清。

You know, if you want to measure the potential energy of something in a gravitational field, you have to define the zero somewhere, right, because it's arbitrary. You can set it anywhere you want. It's the same with enthalpy.
你知道，如果你想測量重力場,中某種東西的勢能，你需要，在某処定義一個零點，對吧？,因爲勢能的值是任意的,你可以把它設定在。
麻省理工公開課 - 熱力學與動力學課程節(jié)選

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