A) increases with increase in temperature
B) decreases with increase in temperature
C) is not affected by change in temperature
D) increases for germanium and decreases for silicon
Correct Answer: B
Solution :
n-type semiconductor crystal has freely moving (negative) electrons and an equal' number of stationary positively charged donor ions. The crystal as a whole is neutral while in p-type semiconductor crystal has freely moving (positive) holes and an equal number of stationary negatively charged acceptor ions. Hence, p-type semiconductor material has fewer free electrons.
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