Download DBATU B-Tech 1st Year 2017 Oct Basic Electronic Engineering Question Paper

Download DBATU (Dr. Babasaheb Ambedkar Technological University) B.Tech First Year 2017 Oct Basic Electronic Engineering Question Paper

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DR. BABASAHEB AMBEDKAR TECHNOLOGICAL UNIVERSITY, LONERE ?
RAIGAD -402 103
Mid Semester Examination - October - 2017
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Branch: Group B Sem:- 1
Subject with Subject C0de:- Basic Electronics Engineering ( EXEIOS) Marks: 20
Date:- OctoberS, 2017 Time:- 1 Hr.
Instructions:-
i) Ali questions are compulsory
ii) Figures to the right indicates marks
iii) Assume suita ble data whenevernecessary
Q. '1. Write the appropriate choice for the following questions (06)
I. The diameter of an atom ranges from about
a) 1X 10"0 pm to 5 X 10"" pm
b) H 10?" cm to 5 X10""cm
e) 1X10'?? mm to 5 X 10"? mm
d) ]X 10"" m to 5 X 10?? m
11. Which of the material whose conductivity falls between those of conductors and
insulators: a) Gold, b) Germanium, c) Silver, d) Te?on
III. Which of the trivalent impurity material has 3 valence electrons?
a) Arsenic, b) Gallium, c) Antimony, d) Bismuth
IV. Complete transfer of one or more electrons from one atom to different atom forms
a) ionic bonds, 1)) covalent bonds c) metallic bonding d) cn?ordinate bonding
V. The total energy of revolution of a revolving electron in an atom can
a) Have any value above zero, b) never be positive, e) never be negative, (1) not be
calculated
VI. Pairs of outer shell electrons not used in bonding are called as
a) valence electrons, b)loner electrons, c) electrovalem electrons, d) lone pairs
Q. 2. Attempt any one 0fthe following: (06)
3) Explain the ionic bond and covalent bond of the atom.
b) Discuss the intrinsic and extrinsic semiconductors.
Q. 3. Attempt any two of the following (08)
a) Draw and explain the energy band structure of metals, semiconductors and
insulators.
b) Expain the concept of Fermi energy level in 13- type semiconductor
c) Explain the mner breakdown and avalanche breakdown .
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5 LIBRARY 3
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