To measure current, the unit of measure used is ampere (A). To measure voltage, volt (V) is used. These units are necessary in order to compare different currents and different voltages. In the same manner, a unit of measure is needed to compare the resistance of different conductors. As we have learned earlier that the basic unit of resistance is ohm, equal to that resistance which will allow exactly one ampere of current to flow when one volt of emf is applied across the resistance. When one volt causes one ampere of current flow, the resistance is one ohm. Units of resistance are converted in the same manner as unit of current or voltage.
12 comments:
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