Air-India Paper-1
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Question 1 of 50
1. Question
1 pointsThe output of OR gate is 1 when?
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Question 2 of 50
2. Question
1 pointsLine spectrum is obtained from the?
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Question 3 of 50
3. Question
1 pointsA moving charge produces:
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Question 4 of 50
4. Question
1 pointsIn semiconductors at a room temperature
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Question 5 of 50
5. Question
1 pointsLight year is a unit of
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Question 6 of 50
6. Question
1 pointsIt is easier to draw up wooden block along an inclined plane than bang it up vertically principally because:
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Question 7 of 50
7. Question
1 pointsIf a piece of ice floating on the surface of water in a beaker melts completely, the level of water
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Question 8 of 50
8. Question
1 pointsA Kelvin thermometer and a Fahrenheit thermometer used to record temperature of melting metal, read the same. What will a celcius thermometer read at that temperature?
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Question 9 of 50
9. Question
1 pointsA hydrogen-filled balloon expands as it rises and may even burst after rising very high in the atmosphere. This happens because:
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Question 10 of 50
10. Question
1 pointsif two substances of equal volumes but of different densities are dropped from the same height simultaneously, then
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Question 11 of 50
11. Question
1 pointsWhen the bob of a pendulum is at the mean position (minimum displacement) of its motion,its total energy is:
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Question 12 of 50
12. Question
1 pointsA red and a green pencil are taken in a room illuminated with green light. In the room:
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Question 13 of 50
13. Question
1 pointsThe consumption of electrical energy in the household is measured in terms of:
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Question 14 of 50
14. Question
1 pointsA magnet is placed in earth?s magnetic field with north pole of the magnet pointing north. At the neutral point:
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Question 15 of 50
15. Question
1 pointsSudden fall of a barometer reading indicates:
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Question 16 of 50
16. Question
1 pointsIf a ball and a rectangular block of different metal when completely immersed in a liquid,have the same loss of weight, then
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Question 17 of 50
17. Question
1 pointsIf the period of oscillation of a simple pendulum is 4 seconds and we want to convert it into a second pendulum, then we have to:v
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Question 18 of 50
18. Question
1 pointsThe escape velocity of a body from the earth depends upon:
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Question 19 of 50
19. Question
1 pointsA cyclist taking a turn bends inside because:
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Question 20 of 50
20. Question
1 pointsIf the surface of water in a lake is just going to freeze, then the temperature of water at the bottom is
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Question 21 of 50
21. Question
1 pointsThe tangent law is applicable only when:
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Question 22 of 50
22. Question
1 pointsA moving coil galvanometer is converted into an ammeter by putting:
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Question 23 of 50
23. Question
1 pointsLenz?s law is derived from the law of conservation of:
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Question 24 of 50
24. Question
1 pointsOn which one of the factors does the sensivity of a galvanometer depend?
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Question 25 of 50
25. Question
1 pointsA depletion layer consists of?
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Question 26 of 50
26. Question
1 pointsThe transfer ratio beta of a transistor is 50. The input resistance of the transistor when used in the common emitter configuration is 1 kOhm. The peak value of the co current for an A.C. input voltage of 0.01 V peak is ?
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Question 27 of 50
27. Question
1 pointsThe cause of the potential barrier in a p-n diode is ?
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Question 28 of 50
28. Question
1 pointsIn forward bias, the width of potential barrier in a p-n junction diode?
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Question 29 of 50
29. Question
1 pointsA depletion layer consists of?
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Question 30 of 50
30. Question
1 pointsWhich of the following when added acts as an impurity into silicon produced n-type semi conductor?
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Question 31 of 50
31. Question
1 pointsIn a junction diode, the holes are due to
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Question 32 of 50
32. Question
1 pointsThe intrinsic semiconductor becomes an insulator at
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Question 33 of 50
33. Question
1 pointsFor a common emitter circuit if IC/IE = 0.98 then current gain for common emitter circuit will be
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Question 34 of 50
34. Question
1 pointsIn a p-n junction
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Question 35 of 50
35. Question
1 pointsIn the case of a common emitter transistor amplifier the ratio of the collector current to the emitter current Ic/Ie is 0.96. The current gain of the amplifier is ?
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Question 36 of 50
36. Question
1 pointsif a full wave rectifier circuit is operating from 5oHz mains, the fundamental frequency in the tipple will be
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Question 37 of 50
37. Question
1 pointsA n-p-n transistor conducts when ?
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Question 38 of 50
38. Question
1 pointsBarrier potential of a p-n junction diode does not depend on?
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Question 39 of 50
39. Question
1 pointsReverse bias applied to a junction diode
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Question 40 of 50
40. Question
1 pointsIn semiconductors at a room temperature
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Question 41 of 50
41. Question
1 pointsThe output of OR gate is 1 when?
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Question 42 of 50
42. Question
1 pointsIn a p-n junction photo cell, the value of the photo-electromotive force produced by monochromatic light is proportional to ?
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Question 43 of 50
43. Question
1 pointsChoose the only false statement from the following.
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Question 44 of 50
44. Question
1 pointsCarbon, Silicon and Germanium atoms have four valence electrons each. Their valence and conduction bands are separated by energy band gaps represented by (Eg)C, (Eg)Si and (Eg)Ge respectively. Which one of the following relationship is true in their case?
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Question 45 of 50
45. Question
1 pointsApplication of a forward bias to a p?n junction
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Question 46 of 50
46. Question
1 pointsZener diode is used for?
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Question 47 of 50
47. Question
1 pointsA current carrying coil is subjected to a uniform magnetic field. The coil will orient so that its plane becomes ?
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Question 48 of 50
48. Question
1 pointsTesla is the unit of
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Question 49 of 50
49. Question
1 pointsEnergy in a current carrying coil is stored in the form of ?
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Question 50 of 50
50. Question
1 pointsBesides his parents, he _________also present at the function.
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