If \[{{n}_{e}}\] and \[{{n}_{h}}\] are the number of electrons and hol – McqOptions

MCQOPTIONS

1.	If \[{{n}_{e}}\] and \[{{n}_{h}}\] are the number of electrons and holes in a semiconductor heavily doped with phosphorus, then [MP PMT 2000]
A.	\[{{n}_{e}}>>{{n}_{h}}\]
B.	\[{{n}_{e}}<<{{n}_{h}}\]
C.	\[{{n}_{e}}\le {{n}_{h}}\]
D.	\[{{n}_{e}}={{n}_{h}}\]
Answer» B. \[{{n}_{e}}<<{{n}_{h}}\]

Discussion

No Comment Found

Related MCQs

Find the equivalent thermal resistance of combination of rods as shown in figure. Every rod has same length I and cross-sectional area A. Thermal conductivities are mentioned in figure.
The ripple factor in a half wave rectifier is [RPMT 2002]
Assertion : Two persons on the surface of moon cannot talk to each other. Reason : There is no atmosphere on moon.
A potential barrier of 0.50 V exists across a P-N junction. If the depletion region is \[5.0\times {{10}^{-7}}\]m wide, the intensity of the electric field in this region is [UPSEAT 2002]
The laptop PC?s modern electronic watches and calculators use the following for display
The reason of current flow in P-N junction in forward bias is [RPMT 2000]
The period of a simple pendulum is doubled, when [CPMT 1974; MNR 1980; AFMC 1995; Pb. PET/PMT 2002]
The period of oscillation of a simple pendulum of constant length at earth surface is T. Its period inside a mine is [CPMT 1973; DPMT 2001]
Assertion : To protect any instrument from external magnetic field, it is put inside an iron body. Reason : Iron is a magnetic substance.
Two travelling waves \[{{y}_{1}}=A\sin [k(x-ct)]\] and\[{{y}_{2}}=A\sin [k(x+ct)]\]are superimposed on string. The distance between adjacent nodes is