mho

mho — noun

1. A scientific unit used for measuring how easily an electric current can pass thr

1.名詞C2
釋義

A scientific unit used for measuring how easily an electric current can pass through a material or component. One mho is the equivalent of one siemens, the modern standard term, and is found by dividing 1 by the resistance measured in ohms.

例句

To find the mho value of the copper wire, divide one by the resistance in ohms.

reciprocal of ohms: mho = 1 ÷ ohm

Two mhos of conductance means current flows twice as easily as through a 1-ohm resistor.

同義詞
  • siemens

    The modern SI name for the same unit; siemens is the preferred term in current scientific writing, while mho is historical or niche.

反義詞
  • ohm

    The unit of electrical resistance; ohm and mho are mathematical reciprocals of each other (1 mho = 1 / 1 ohm).

用法筆記

The word mho is ohm spelled backwards, and its symbol ℧ is an upside-down capital omega. The term has largely been replaced by siemens (symbol S) in modern SI use, but it still appears in older technical texts and some engineering contexts.

常見錯誤

❌The mho measures resistance in a circuit.
✅The mho measures conductance in a circuit.
💡Mho is the opposite of ohm: it measures how easily current flows, not how much it resists.
❌The wire has 5 mhos of resistance.
✅The wire has 5 mhos of conductance.
💡Conductance and resistance are different properties; mho always describes conductance.