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The rise in the junction temperature of a practical p-n junction diode typically results in an increase in the reverse saturation current (I₀), which can lead to a decrease in the breakdown voltage and overall performance of the diode. It may also affect the forward voltage drop when the diode is conducting.
a
Explanation: The rise in temperature excites the charges, which go & recombine with the charges in the depletion region decreasing its width. Higher the temperature, lesser is the E.M.F required to turn on the device