In semiconductor the concentrations of electrons and holes are 8 ´ 1018/m3 and 5 ´ 1018/m respectively. If the mobilities of electrons and hole are 2.3 m2/volt-sec and 0.01 m2/volt-sec respectively, then semiconductor is

P-type and its resistivity is 0.034 ohm-metre

N-type and its resistivity is 0.34 ohm-metre

N-type and its resistivity is 0.034 ohm-metre

P-type and its resistivity is 3.40 ohm-metre

In semiconductor the concentrations of electrons and holes are 8 ´ 10

1.	In semiconductor the concentrations of electrons and holes are 8 ´ 1018/m3 and 5 ´ 1018/m respectively. If the mobilities of electrons and hole are 2.3 m2/volt-sec and 0.01 m2/volt-sec respectively, then semiconductor is
A.	N-type and its resistivity is 0.34 ohm-metre
B.	P-type and its resistivity is 0.034 ohm-metre
C.	N-type and its resistivity is 0.034 ohm-metre
D.	P-type and its resistivity is 3.40 ohm-metre
Answer» B. P-type and its resistivity is 0.034 ohm-metre