Question

The conductivity of intrinsic semiconductors can be increased by adding a suitable impurity. This process is called $(P)$. This can be done with an impurity which is $(Q)$ rich or deficient as compared to the semiconductor. Such impurities introduce $(R)$ defects in them. Electron rich impurities result in $(S)$ type semiconductors while electron deficit impurities result in $(T)$ type semiconductors.

• A. a
• B. b
• C. c
• D. d

Answer 1

Answer: (D)

d

Answer 2

To increase the conductivity of intrinsic semiconductor, some impurities are added. This process is called doping $( P )$. The impurity can be of two type - electron (Q) rich or deficient. Due to doping, electronic $( R )$ defects are introduced in the matter. If the impurities are electron rich then it will lead to the formation of n-type (S) semiconductors and if the impurities are electron deficit then it will lead to the formation of p-type semiconductor (T).