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Ohmmeter

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An Ohmmeter is an electronic measuring instrument that measures resistance, the opposition to the flow of an electric current.

The original design of an ohmmeter provided a small battery to apply a voltage to a resistance. It used a galvanometer to measure the electric current through the resistance. The scale of the galvanometer was marked in ohms, because the fixed voltage from the battery assured that as resistance decreased, the current through the meter would increase.

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