QUIZ OF DAY-Electrical Engineering
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Attempt Free QUIZ OF DAY-Electrical Engineering Here. Read The Important Electrical MCQ From Below.
1. Electrical conductivity of insulators is the range _____________.
(a) 10-10(Ω-mm)-1
(a) 10-10(Ω-mm)-1
(b) 10-10(Ω-cm)-1
(c) 10-10(Ω-m)-1
(d) 10-8(Ω-m)-1
Answer-a
2. Units for electric field strength
(a) A/cm2
(a) A/cm2
(b) mho/meter
(c) cm2/V.s
(d) V/cm
Answer-c
3. Energy band gap size for semiconductors is in the range ________ eV.
(a)1-2
(a)1-2
(b) 2-3
(c) 3-4
(d) > 4
Answer-b
QUIZ OF DAY-Electrical Engineering
4. Energy band gap size for insulators is in the range ________ eV.
(a)1-2
(a)1-2
(b) 2-3
(c) 3-4
(d) > 4
Answer-c
5. Flow of electrons is affected by the following
(a) Thermal vibrations
(a) Thermal vibrations
(b) Impurity atoms
(c) Crystal defects
(d) all
Answer-d
6. Not a super conductive metallic element
(a) Fe
6. Not a super conductive metallic element
(a) Fe
(b) Al
(c) Ti
(d) W
Answer-b
QUIZ OF DAY-Electrical Engineering
7. Fermi energy level for intrinsic semiconductors lies
(a) At middle of the band gap
(a) At middle of the band gap
(b) Close to conduction band
(c) Close to valence band
(c) Close to valence band
(d) None
Answer-c
8. Fermi energy level for p-type extrinsic semiconductors lies
(a) At middle of the band gap
(a) At middle of the band gap
(b) Close to conduction band
(c) Close to valence band
(c) Close to valence band
(d) None
Answer-c
9. Fermi energy level for n-type extrinsic semiconductors lies
(a) At middle of the band gap
(a) At middle of the band gap
(b) Close to conduction band
(c) Close to valence band
(c) Close to valence band
(d) None
Answer-b
QUIZ OF DAY-Electrical Engineering
10. Not an example for intrinsic semiconductor
(a) Si
(a) Si
(b) Al
(c) Ge
(d) Sn
Answer-a
11. In intrinsic semiconductors, number of electrons __________ number of holes.
(a) Equal
(a) Equal
(b) Greater than
(c) Less than
(d) Can not define
Answer-c
12. In n-type semiconductors, number of holes __________ number of electrons.
(a) Equal
(a) Equal
(b) Greater than
(c) Less than
(d) Can not define
Answer-c
13. In p-type semiconductors, number of holes __________ number of electrons.
(a) Equal
(a) Equal
(b) Greater than
(c) Less than
(d) Twice
Answer-b
QUIZ OF DAY-Electrical Engineering
14. Mobility of holes is ___________ mobility of electrons in intrinsic semiconductors.
(a) Equal
(a) Equal
(b) Greater than
(c) Less than
(d) Can not define
Answer-d
15. Fermi level for extrinsic semiconductor depends on
(a) Donor element
(a) Donor element
(b) Impurity concentration
(c) Temperature
(d) All
Answer-d
16. Value of dielectric constant for a material __________.
(a) Equal to 1
(a) Equal to 1
(b) Greater than 1
(c) Less than 1
(d) Zero.
Answer-a
17. High dielectric constant material is must for __________.
(a) Insulation of wires
(a) Insulation of wires
(b) Generators
(c) Switch bases
(d) Generators.
Answer-a
QUIZ OF DAY-Electrical Engineering
18. Dielectric constant for most polymers lies in the range of _______.
(a) 1-3
(a) 1-3
(b) 2-5
(c) 4-7
(d) 6-10.
Answer-c
19. Example for piezo-electric material
(a) Rochelle salt
(a) Rochelle salt
(b) Lead zirconate
(c) Potassium niobate
(d) Barium Titanium oxide
Answer-b
20. Example for ferro-electric material
(a) Potassium niobate
(a) Potassium niobate
(b) Lead titanate
(c) Lead zirconate
(d) quartz
Answer- b
Answer- b
QUIZ OF DAY-Electrical Engineering
