NDA 2009 - Solved Paper

Solved Question Paper - General Knowledge

33. Consider the following parts of spectra

  1. Visible
  2. infrared
  3. Ultraviolet
  4. Microwave

Which one of the following is the correct sequence in which their wavelengths increase?

  1. 4-3-1-2
  2. 4-1-2-3
  3. 3-2-1-4
  4. 3-1-2-4

34. Propagation of light quanta may be described by

  1. Photons
  2. Protons
  3. Neutrons
  4. Electrons

35. Which one of the following is not electromagnetic in nature?

  1. Cathode-rays
  2. X-rays
  3. Gamma-rays
  4. Infrared-rays

36. Which one of the following is the value of current I in the circuit shown above?

  1. 5 A
  2. 10 A
  3. 15 A
  4. 20 A

37. The force experienced by a unit positive test charge placed at a point is called

  1. Magnetic field at that point
  2. Gravitational field at that point
  3. Electrical field at that point
  4. Nuclear field at that point

38. A long jumper runs before jumping because he

  1. covers a greater distance
  2. maintains momentum conservation
  3. gains energy by running
  4. gains momentum

39. Which among the following is the necessary condition for simple harmonic motion?

  1. Constant period
  2. Contant acceleration
  3. Displacement and acceleration are proportional
  4. Displacement and torque are proportional

40. Consider the following four particles :

  1. Alpha particle
  2. Proton
  3. Electron
  4. Neutron

Which of the following is the correct sequence in which their rest-masses increase?

  1. 3-4-2-1
  2. 4-2-3-1
  3. 3-2-4-1
  4. 2-3-1-4

41. If an α-particle is projected normally through a uniform magnetic field, then the path of the α-particle inside the field will be

  1. circular
  2. parabolic
  3. elliptic
  4. a straight line

42. How far must a girl stand in front of a concave spherical mirror of radius 120cm to see an erect image of her face four times its natural size?

  1. 40 cm from the mirror
  2. 45 cm from the mirror
  3. 50 cm from the mirror
  4. 55 cm from the mirror

43. Match List I with List II and select the correct answer using the code given below the lists

List I
(Type of electromagnatic radiation)		List II
( Approximate wavelength in metres)
A. Infrared radiation 1. 10-12
B. X-rays 2. 10-5
C. Ultraviolet radiation 3. 10-10
D. gamma rays 4. 10-8

Code:

  1. A - 2; B - 3; C - 4; D - 1
  2. A - 1; B - 4; C - 3; D - 2
  3. A - 1; B - 3; C - 4; D - 2
  4. A - 2; B - 4; C - 3; D - 1

44. The standing wave pattern along a string of length 60 cm is shown in the above diagram. If the speed of the transverse wave on this string is 300 m/s, in which one of the folowing modes is the string vibrating?

  1. Fundamental
  2. First overtone
  3. Second overtone
  4. Third overtone

45. A sonometer wire having a length of 50 cm is vibrating in the fundamental mode with a frequency of 100 Hz. Which of the following is the type of propagating wave and its speed?

  1. longitudinal, 50 m/s
  2. Transverse, 50 m/s
  3. Longitudinal, 100 m/s
  4. Transverse, 100 m/s

46. Which one of the following is the amount of heat given up when 20g of steam at 100°C is condensed and cooled to 20°C?

  1. 10000 cal
  2. 11400 cal
  3. 12400 cal
  4. 13600 cal

47. Which one of the following is the mode of heat tansfer in which warm material is transported so as to displace a cooler material?

  1. Conduction only
  2. Convection Only
  3. Radiation
  4. Both conduction and convection

48. Consider the following statements :

  1. Different plant species grow together.
  2. Light cannot penetrate into the lower strata full of undergrowth.

Which of the following types of vegetation is characterized by the above?

  1. Equatorial moist evergreen
  2. Tropical deciduous
  3. Mediterranean
  4. Warm temperate broad leaved deciduous

49. From which one of the following is the percentage of reflected amount of radiation highest?

  1. wet ground
  2. thick cloud
  3. forest
  4. snow cover

50. On planet Earth there is no centrifugal force at the

  1. Equator
  2. Tropic of Cancer
  3. Tropic of Capricon
  4. Poles