Q.
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a
In P-type semi conductor crystal, each impurity atom provides a hole to crystal structure and becomes negative ion
b
In P-type semi conductors the average energy of holes in valance band is less than that of electrons in conduction band
c
The fermi energy level in p type semi conductors is just above the valance band
d
The relation between the electrons density ne and. Hole density nh are related as nenh=ni2 where ni is intrinsic charge carrier density
answer is B.
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