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A semiconductor has equal electron and h...

A semiconductor has equal electron and hole concentration of `2 xx 10^(8)m^(-3)`. On doping with a certain impurity, the hole concertraction increases to `4 xx 10^(10)m^(-3)`. (i) What type of semiconductor is obtained on doping? (ii) Calculate the new electron hole concentration of the semiconductor. (iii) How does the energy gap vary with doping?

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