Basic Electronics MCQ’s for MS and Ph.D admission in universities
1. Semiconductor’s have which of the following bond?
a) Co-ordinate bond
b) Covalent bond
c) Electrovalent bond
d) all of the above
2. Pure silicon has a resistivity of …
a) 6000 Ω cm
b) 1000 Ω cm
c) 300 Ω m
d) 600 Ω cm
3. The region of semi-conductor which is lightly doped is known as …
a) base
b) source
c) emitter
d) all of these
4. Diamond is an example of …
a) Insulator
b) Conductor
c) Semi-Conductor
d) none of the above
5. Quantities whose values vary in non-continuous manner are
a) analogue
b) vector
c) scalar
d) digital
6. Mutual induction is dependent on which of the following factor …
a) output polarities
b) current changes
c) winding ratios
d) none of these
7. The common collector amplifier is called as …
a) emitter follower
b) base follower
b) collector follower
d) source follower
8. When we heat a pure semiconductor its resistance goes …
a) goes down
b) goes up
c) remains constant
d) none of these
9. Why semiconductor crystal is much strong?
a) forces between nuclei
b) electron-pair bonds
c) forces between protons
d) all of the above
10. The pentavalent impurities are basically
a) acceptors
b) donors
c) both
d) none of above
11. CRO stands for
a) cathode ray oscillioscope
b) cathode ray output
c) cathode oscillator
d) none of these
12.  In AND gate if any of logic input is ‘0’ then output will be …
a) 0
b) 1
c) 2
d) 3
