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Q#1 PN Junction Theory GATE EC 1991 MSQ +2 marks -0 marks

The current I in a forward biased  junction shown in figure (a) is entirely due to diffusion of holes from  and . The injected hole concentration distribution in the n-region is linear as shown in figure (b), with  and .

Determine:

(a) The current density in the diode, assuming that the diffusion coefficient of holes is

(b) The velocity of holes in the n-region at.

C:\Users\ads\Desktop\ECE PY\diagram\c-2, q-3(a,b).jpg

(a) 

(b)

(a)

(b)

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