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安培

安培(簡稱安,符號A)係比電流嘅單位,佢係以法國物理學家安德烈-瑪麗·安培André-Marie Ampère)命名嘅。

1安培係喺兩條無限長平行直導線,喺真空相距1米,通咗固定而相同電流,導致每米導線所受嘅力係2×10-7N嗰陣,每導線上電流嘅大細。

計算公式:1A = 1C/s(喺導體截面上每秒有1庫侖電子通過,就係一安培)

比安培細嘅電流可以用毫安、微安表示。

  • 1安(A) = 1000毫安(mA)
  • 1毫安(mA)= 1000微安(μA)

睇埋

[編輯]
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安培
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