1. In an n-type silicon crystal at room temperature, which of
the following can have a concentration of 4 x 1019 cm-3 ?
(A)
Silicon atoms (B) Holes
(C) Dopant atoms (D)
Valence electrons
2. The full forms of the abbreviations TTL and CMOS in
reference to logic families are
(A)
Triple Transistor Logic and Chip Metal Oxide
Semiconductor
(B)
Tristate Transistor Logic and Chip Metal Oxide
Semiconductor
(C)
Transistor Transistor Logic and Complementary
Metal Oxide Semiconductor
(D) Tristate
Transistor Logic and Complementary Metal Oxide Silicon
Ans :
3. The ratio of the mobility to the diffusion coefficient in a
semiconductor has the units
semiconductor has the units
(C) V.cm-1 (D) V.S
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