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Ohm is a unit of resistance. Symbolised by the Greek capital letter omega (Ω). It is defined as the resistance, at 0o C, of a uniform column of mercury weighing 14.451 grams. One ohm is the value of resistance through which a potential difference of one volt will maintain a current of one ampere.

Offset voltage

Offset voltage refers to the observed voltage on the isolated conductive plate of a charged plate monitor that has been placed in an ionised environment.

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