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OCR: OHM'S LAW HE GERMAN scientist Georg Ohm (1787 1854) demonstrated that all materials offer resistance to the flow of electric charge The greater the resi stance offered the material, the greater the voltage needed to make the electric charge flow. Ohm' experiments showed that there was link between resistance, voltage, and current His law of 1826 states that, provided temperature (and hence resistance is kept constant, voltage proportional to current This written as (voltage) (current) X R resistance) scientis