Plot a graph showing variation of current versus voltage for the material GaAs.

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According to Ohm's Law, the current passing through a conductor is directly proportional to the voltage applied across it. Thus V∝I ⟹VI=R R is the resistance of the conductor. Hence for Ohm's law to obeyed, the slope of I vs V curve is constant and positive. Hence region BC obeys Ohm's law. For...
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According to Ohm's Law, the current passing through a conductor is directly proportional to the voltage applied across it. Thus V∝I ⟹VI=R R is the resistance of the conductor. Hence for Ohm's law to obeyed, the slope of I vs V curve is constant and positive. Hence region BC obeys Ohm's law. For R to be negative, slope of I vs V curve should be negative, which is there for region DE. read less
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