The charge carriers in semiconductor are

To obtain electrons as majority charge carriers in a semiconductor, the impurity mixed is

To obtain electrons as majority charge carriers in a semiconductor, the impurity mixed is

Name any one method of increasing the number of charge carriers in a semiconductor .

The total number of negative charge carriers in an intrinsic semiconductor is n. What is the total number of positive charge carriers in this semiconductor ?

The intrinsic number density of charge carriers in a semiconductor is 2.5 xx 10^13 cm^-3 . It is doped with donor atoms of number density 1.25 xx 10^17cm^-3 , the ratio of conductivities of doped and intrinsic semiconductors is