The strength of a semiconductor crystal comes from______________?
(A) Forces between nuclei
(B) Forces between protons
(C) Electron-pair bonds
(D) None of the above
A semiconductor is formed by ______________bonds?
(A) Covalent
(B) Electrovalent
(C) Co-ordinate
(D) None of the above
The resistivity of a pure silicon is about _______________?
(A) 100 O cm
(B) 6000 O cm
(C) 3 x 105 O m
(D) 6 x 10-8 O cm
When a pentavalent impurity is added to a pure semiconductor, it becomes________________?
(A) An insulator
(B) An intrinsic semiconductor
(C) p-type semiconductor
(D) n-type semiconductor
An n-type semiconductor is______________?
(A) Positively charged
(B) Negatively charged
(C) Electrically neutral
(D) None of the above
Addition of pentavalent impurity to a semiconductor creates many________________?
(A) Free electrons
(B) Holes
(C) Valence electrons
(D) Bound electrons
The leakage current across a pn junction is due to________________?
(A) Minority carriers
(B) Majority carriers
(C) Junction capacitance
(D) None of the above
With forward bias to a pn junction , the width of depletion layer__________________?
(A) Decreases
(B) Increases
(C) Remains the same
(D) None of the above
At room temperature, an intrinsic semiconductor has_______________?
(A) Many holes only
(B) A few free electrons and holes
(C) Many free electrons only
(D) No holes or free electrons
At room temperature, an intrinsic silicon crystal acts approximately as_______________?
(A) A battery
(B) A conductor
(C) An insulator
(D) A piece of copper wire