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Part IV. Computational Questions. \( \left(10^{\prime} \times 4=40^{\prime}\right) \) 1. The electric field profile in the depletion region of a Si PN junction in equilibrium is shown in the figure. (The depletion approximation is assumed). (1) Indicate the P-side and N-side, respectively. (2) Is the n-side depletion regions uniformly doped? Why? (3) What is the doping density on the left side? (4) If the voltage is zero at \( x=0 \), then what is the voltage at \( x=1.0 \mu \mathrm{m} \) ?

(1) P side have negative change of depletion layer i.e. ?0.1?x?1 and for 0?x?1 Is N region. (2) Since the length of