Explain forward bias and reverse bias, Physics

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Explain briefly, with the help of circuit diagram, how V - I characteristics of a p-n junction diode are obtained ii

(i) forward bias, and

(ii) reverse bias.

Illustrate the shape of the curves obtained.

(b) A semiconductor has equal electron and hole concentration of 6 x 108 /m3. On doping with certain impurity, electron concentration increases to 9 X1012 /m3.

(i) Recognize the new semiconductor obtained after doping.

(ii) Calculate the new hole concentration

 


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