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*For a positive [[Potential Difference|potential difference]] the [[Electrical Current|current]] increases rapidly with an increase in [[Potential Difference|potential difference]]
*For a negative [[Potential Difference|potential difference]] the [[Electrical Current|current]] remains negligible and does not increase as the [[Potential Difference|potential difference]] becomes larger.
====Explanation====
: The [[Electrical Resistance|resistance]] of a [[diode]] is very low for [[Electrical Current|current]] in the forward direction and very high in the back direction.