Answer :

It is given that drift current is 25 μA and biasing current is 75 μA at 200 mV forward biasing.

A. We know that when the diode is unbiased,


Diffusion current = drift current = 25μA


B. When the diode is reverse biased, diffusion current = 0


C. When the diode is forward biased at 200mV,


Diffusion current - Drift current = Forward biasing current


Diffusion current – 25 μA = 75 μA


Diffusion current = (75+25) μA


Diffusion current =100 μA


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