From the graph between current I and voltage V showing portions AB, BC, CD and DE, which part represents negative resistance? [Diagram: Image]
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From the graph between current I and voltage V showing portions AB, BC, CD and DE, which part represents negative resistance? [Diagram: Image]

G1 Physics · Accepted Answer

Step 1: Differential resistance r = dV/dI; negative differential resistance corresponds to dI/dV < 0. Step 2: On the given I–V graph, current falls as voltage rises in the section CD. Step 3: Therefore CD is the negative-slope part.