Editing Ohmmeter (section)

{{short description|Tool for measuring electrical resistance}}
{{distinguish|ohm metre}}
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{{More citations needed|date=November 2012}}
{{lead too short|date=August 2019}}
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[[file:Ohmmeter.jpg|thumb|An analog ohmmeter]]

An '''ohmmeter''' is an [[electricity|electrical]] [[measuring instrument|instrument]] that measures [[electrical resistance]] (the opposition offered by a circuit or component to the flow of [[electric current]]). Multi-meters also function as ohmmeters when in resistance-measuring mode.  An ohmmeter applies current to the circuit or component whose resistance is to be measured. It then measures the resulting voltage and calculates the resistance using [[Ohm’s law]] .

<math>V=IR</math>An ohmmeter should not be connected to a circuit or component that is carrying a current or is connected to a power source. Power should be disconnected before connecting the ohmmeter.  Ohmmeters can be either connected in series or parallel based on requirements (whether resistance being measured is part of circuit or is a shunt resistance).