BSNL Exam Placement Papers-13
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Question 1 of 50
1. Question
1 pointsThe function of oxide layer in IC fabricaton is
1. to mask against diffusion
2. to insulate surface electricity
3. to produce chemical stable surface
4. to increase the metling point
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Question 2 of 50
2. Question
1 pointsConsider a single crystal of an intrinsic semi-conductor. The number of free carriers at the fermi level at room temperature is
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Question 3 of 50
3. Question
1 pointsIf the molecular structure and density of the material are known, then which of the following material parameters may be determined from the ?r versus 1/T plot?
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Question 4 of 50
4. Question
1 pointsThe electron relaxation time of metal A is 2.7*10-4 sec that of B is 1.35*10-4 sec. The ratio of resistivity of B to resistivity of A will be
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Question 5 of 50
5. Question
1 pointsElectrical conductivity of copper reduces with addition of a small amount of nickel because
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Question 6 of 50
6. Question
1 pointsMagnetic susceptibility of an ideal Type-I super-conductor in the super-conductivity state is
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Question 7 of 50
7. Question
1 pointsWhen the transition occurs to the super conducting state, the magnetic flux is excluded from the material. This is known as
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Question 8 of 50
8. Question
1 pointsCu2 MnAl is
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Question 9 of 50
9. Question
1 pointsIn an intrinsic semi-conductor, the mobility of electrons in the conduction band is
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Question 10 of 50
10. Question
1 pointsThe effect of doping intrinsic semi- conductors is to
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Question 11 of 50
11. Question
1 pointsThe hall co-efficient of sample (A) of a semi-conductor is measured at room temperature. The hall co-efficient of A at room temperature is 4*10-4 m3 colomb-1 . The carrier concentration in sample A at room temperature is
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Question 12 of 50
12. Question
1 pointsThe hall angle ? of a metal sample is
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Question 13 of 50
13. Question
1 pointsThe resistance of a thermistor is 5000 ? at 200 C and its resistance temperature co-efficient is 0.04/0C. A measurement with a lead resistance of 10 ? will cause an error of
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Question 14 of 50
14. Question
1 pointsWhen a solid crystal of sodium is formed, the 3s-band will have
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Question 15 of 50
15. Question
1 pointsThe relaxation time (?) in a perfect dielectric is
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Question 16 of 50
16. Question
1 pointsThe number of stress co-efficients or constants which characterize a piezoelectric material is
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Question 17 of 50
17. Question
1 pointsThe conductivity of a metal at ultraviolet frequency (1014 Hz) approximately equals
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Question 18 of 50
18. Question
1 pointsConstantan is an alloy composed of
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Question 19 of 50
19. Question
1 pointsWhat type of magnetic behaviour is observed in a type-I super-conductor?
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Question 20 of 50
20. Question
1 pointsThe super-conducting transition temperature of lead is 7.26 K. If the initial field at OK is 64*103 Amp/m, then the critical field at 5 K is
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Question 21 of 50
21. Question
1 pointsA paramagnetic material is used in an energy conversion process in which the following events occur:
1. Thermal energy is generated
2. Dipoles are turned
3. Magnetic field is generated
4. Material reacts to oppose it.
The correct sequence of these event isThanks! Your report has been sent to webmaster.
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Question 22 of 50
22. Question
1 pointsSome magnetic materials may be classified on the basis of
1. Susceptibility
2. Saturation
3. Spin arrangement
4. Nature of hysteresis loop
5. Domain structure
6. Critical temperature above which it behaves as a paramagnetic material.
Out of these, those which can be used to distinguish between ferri and ferromagnetic matgerials would includeThanks! Your report has been sent to webmaster.
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Question 23 of 50
23. Question
1 pointsAssuming carrier mobility to be temperature independent, it can be shown that pure Si (Eg = 1.1 eV) and Ge (Eg = 0.7 eV) have the same conductivity at a temperature of
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Question 24 of 50
24. Question
1 pointsThe processes that can be used to make the steel magnetically softer are
1. Annealing
2. Grain growth
3. Decarburization
4. QuenchingThanks! Your report has been sent to webmaster.
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Question 25 of 50
25. Question
1 pointsPolarization is a measure of
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Question 26 of 50
26. Question
1 pointsConsider the following semi-conductor diodes
1. Germanium diode
2. Silicon diode
3. Tunnel diode
4. Schottky diode
The correct increasing order of forward voltage drop of these diodes isThanks! Your report has been sent to webmaster.
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Question 27 of 50
27. Question
1 pointsHow many schedules the Constitution of India contains ?
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Question 28 of 50
28. Question
1 pointsThe Constitution of India was adopted in?
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Question 29 of 50
29. Question
1 pointsIn a nuclear reactor, one of the following is used as a fuel?
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Question 30 of 50
30. Question
1 pointsThe first muslim ruler to introduce the system of price control was?
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Question 31 of 50
31. Question
1 pointsTansen, a great musician, was in the court of?
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Question 32 of 50
32. Question
1 pointsWho among the following attended all the three Round Table Conferences ?
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Question 33 of 50
33. Question
1 pointsWhere is National Sugar Institute established?
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Question 34 of 50
34. Question
1 pointsA national leader, whose birthday is observed as the National Education Day on November 11, is?
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Question 35 of 50
35. Question
1 pointsThe Nagarjuna Sagar Project is constructed on the river?
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Question 36 of 50
36. Question
1 pointsThe Bermuada Triangle lies in?
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Question 37 of 50
37. Question
1 pointsWho among the following has been honoured with Bharat Ratna for the year 2008 ?
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Question 38 of 50
38. Question
1 pointsWhich of the following is India?s first nuclear powered submarine launched on 26 July, 2009 ?
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Question 39 of 50
39. Question
1 pointsThe speed of light will be minimum while passing through?
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Question 40 of 50
40. Question
1 pointsGalvanised iron sheets have a coating of?
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Question 41 of 50
41. Question
1 pointsI.B.R.D. is also known as?
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Question 42 of 50
42. Question
1 pointsThe Gupta king who assumed the title of Vikramaditya was?
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Question 43 of 50
43. Question
1 pointsPart IV of the Constitution of India deals with?
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Question 44 of 50
44. Question
1 pointsWhich amidst the following countries of the European union has not adopted the single currency Euro ?
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Question 45 of 50
45. Question
1 pointsPermanent members of U. N. Security Council are?
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Question 46 of 50
46. Question
1 pointsThe author of the book ?My Country My Life? is?
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Question 47 of 50
47. Question
1 pointsThe Partition of Bengal was revoked by the British Government in the year?
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Question 48 of 50
48. Question
1 pointsThe first talkie film in India was?
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Question 49 of 50
49. Question
1 pointsBlue Revolution? is related to?
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Question 50 of 50
50. Question
1 pointsIndia has the maximum foreign trade with?
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