Physics · NDA previous year questions

2009 45 questions

1. Q512009 · 30 Aug 2009

   Consider the following statements with respect to the Radar Imaging Satellite (RISAT-2) : 1. This is the first Indian satellite with microwave imaging configuration on board. 2. The satellite will boost India's defence capabilities. 3. It can take images of the earth day and night, even under rainy and cloudy conditions. Which of the statements given above is/are correct?

   1. A.1 only
   2. B.2 and 3 only
   3. C.1, 2 and 3
   4. D.1 and 2 only
   Show answer

   Answer: C

2. Q532009 · 30 Aug 2009

   Which of the following crops would be preferred for sowing in order to enrich the soil with nitrogen?

   1. A.Wheat
   2. B.Mustard
   3. C.Sunflower
   4. D.Gram
   Show answer

   Answer: D

3. Q632009 · 30 Aug 2009

   The weight of a body is $9.8\mathrm{N}$ at the place where $g=9.8\mathrm{m}{\mathrm{s}}^{-2}$. Its mass is

   1. A.zero
   2. B.$9.8\mathrm{kg}$
   3. C.$10\mathrm{kg}$
   4. D.$1\mathrm{kg}$
   Show answer

   Answer: D

4. Q642009 · 30 Aug 2009

   If a light body and a heavy body have equal momentum, then

   1. A.the lighter body has greater kinetic energy than the heavier body
   2. B.the lighter body has lesser kinetic energy than the heavier body
   3. C.the kinetic energy of the lighter body is equal to the kinetic energy of the heavier body
   4. D.the kinetic energy of both the bodies are independent of momentum
   Show answer

   Answer: A

5. Q652009 · 30 Aug 2009

   An object of mass $5\mathrm{kg}$ is attached to the end of a rope. If the rope is pulled upward with an acceleration of $0.30\mathrm{m}{\mathrm{s}}^{-2}$, what is the tension in the rope?

   1. A.$30.5\mathrm{N}$
   2. B.$40.5\mathrm{N}$
   3. C.$50.5\mathrm{N}$
   4. D.$60.5\mathrm{N}$
   Show answer

   Answer: C

6. Q662009 · 30 Aug 2009

   When a mass $m$ is hung on a spring, the spring stretched by $6\mathrm{cm}$. If the loaded spring is pulled downward a little and released, then the period of vibration of the system will be

   1. A.$0.27\mathrm{s}$
   2. B.$0.35\mathrm{s}$
   3. C.$0.49\mathrm{s}$
   4. D.$0.64\mathrm{s}$
   Show answer

   Answer: C

7. Q702009 · 30 Aug 2009

   Consider two hollow glass spheres, one containing water and the other containing mercury. Each liquid fills about one-tenth of the volume of the sphere. In zero gravity environment

   1. A.water and mercury float freely inside the sphere
   2. B.water forms a layer on the glass, while mercury floats
   3. C.mercury forms a layer on the glass, while water floats
   4. D.water and mercury both form a layer on the glass
   Show answer

   Answer: B

8. Q722009 · 30 Aug 2009

   An object is kept $5\mathrm{cm}$ in front of a concave mirror of focal length $15\mathrm{cm}$. What will be the nature of the image?

   1. A.Virtual, not magnified
   2. B.Virtual, magnified
   3. C.Real, not magnified
   4. D.Real, magnified
   Show answer

   Answer: B

9. Q732009 · 30 Aug 2009

   The density of cast iron having specific gravity $7.20$ is

   1. A.$7.20kg/{\mathrm{m}}^3$
   2. B.$720kg/{\mathrm{m}}^3$
   3. C.$72kg/{\mathrm{m}}^3$
   4. D.$7200kg/{\mathrm{m}}^3$
   Show answer

   Answer: D

10. Q742009 · 30 Aug 2009

    What is the telescope designed to search for earth-size planets in the nearby region of our galaxy, termed as?

    1. A.Hubble telescope
    2. B.Kepler telescope
    3. C.Copernicus telescope
    4. D.Newton telescope
    Show answer

    Answer: B

11. Q752009 · 30 Aug 2009
    
    1. A.Option A
    2. B.Option B
    3. C.Option C
    4. D.Option D
    Show answer

    Answer: B

12. Q762009 · 30 Aug 2009

    Net charge in a current-carrying conductor is

    1. A.always positive
    2. B.always negative
    3. C.zero
    4. D.either positive or negative
    Show answer

    Answer: C

13. Q772009 · 30 Aug 2009

    The audible frequency range of a human ear is

    1. A.20 hertz to 200 hertz
    2. B.2 hertz to 20 hertz
    3. C.200 hertz to 2000 hertz
    4. D.20 hertz to 20000 hertz
    Show answer

    Answer: D

14. Q782009 · 30 Aug 2009

    Which one of the following is the resistance that must be placed parallel with $12\Omega$ resistance to obtain a combined resistance of $4\Omega$?

    1. A.$2\Omega$
    2. B.$4\Omega$
    3. C.$6\Omega$
    4. D.$8\Omega$
    Show answer

    Answer: C

15. Q792009 · 30 Aug 2009

    An electric iron of resistance $20\Omega$ takes a current of $5\mathrm{A}$. The heat developed in joules in $30\mathrm{s}$ is

    1. A.$5\mathrm{kJ}$
    2. B.$10\mathrm{kJ}$
    3. C.$15\mathrm{kJ}$
    4. D.$20\mathrm{kJ}$
    Show answer

    Answer: C

16. Q802009 · 30 Aug 2009

    A house, served by a $220\mathrm{V}$ supply line, is protected by a $9\mathrm{A}$ fuse. What is the maximum number of $60$ watt bulbs that can be turned on in parallel?

    1. A.11
    2. B.22
    3. C.33
    4. D.44
    Show answer

    Answer: C

17. Q812009 · 30 Aug 2009

    An object is placed at a distance of $12\mathrm{cm}$ from a convex lens on its principal axis and a virtual image of certain size is formed. If the object is moved further $8\mathrm{cm}$ away from the lens, a real image of the same size as that of the virtual image is formed. Which one of the following is the focal length of the lens?

    1. A.$15\mathrm{cm}$
    2. B.$16\mathrm{cm}$
    3. C.$18\mathrm{cm}$
    4. D.$20\mathrm{cm}$
    Show answer

    Answer: B

18. Q822009 · 30 Aug 2009

    Different objects at different distances are seen by the eye. The parameter that remains constant is

    1. A.the focal length of the eye lens
    2. B.the object distance from the eye lens
    3. C.the radii of curvature of the eye lens
    4. D.the image distance from the eye lens
    Show answer

    Answer: D

19. Q832009 · 30 Aug 2009

    A spring has length 'l' and spring constant 'k'. It is cut into two pieces of lengths $l_1$ and $l_2$ such that $l_1=n{l}_2$. The force constant of the spring of length $l_1$ is

    1. A.$k(1+n)$
    2. B.$k$
    3. C.$k/(n+1)$
    4. D.$k[(n+1)/n]$
    Show answer

    Answer: D

20. Q852009 · 30 Aug 2009

    Water flows out of the hole of a bucket and follows a parabolic path. If the bucket falls freely under gravity, the water flow (ignoring air resistance)

    1. A.follows a straight-line path relative to the falling bucket
    2. B.follows a parabolic path relative to the falling bucket
    3. C.stops
    4. D.decreases but continues to flow
    Show answer

    Answer: C

21. Q862009 · 30 Aug 2009

    $1\mathrm{gm}$ of ice at $0{}^{\circ }\mathrm{C}$ is mixed with $1\mathrm{gm}$ of steam at $100{}^{\circ }\mathrm{C}$. After thermal equilibrium, the temperature of the mixture is

    1. A.$0{}^{\circ }\mathrm{C}$
    2. B.$50{}^{\circ }\mathrm{C}$
    3. C.$80{}^{\circ }\mathrm{C}$
    4. D.$100{}^{\circ }\mathrm{C}$
    Show answer

    Answer: D

22. Q982009 · 30 Aug 2009

    Consider the following statements regarding aluminium paint : 1. It is fairly good heat-resistant. 2. It possesses good electrical resistance. 3. It cannot be used for hot water pipe. Which of the statements given above is/are correct?

    1. A.1 and 3
    2. B.1 only
    3. C.1 and 2
    4. D.2 and 3
    Show answer

    Answer: C

23. Q682009 · 19 Apr 2009

    Non-conductors, whose polarization is caused by an electric field, are known as

    1. A.Semi-conductors
    2. B.Super-conductors
    3. C.Dielectrics
    4. D.Resistive conductors
    Show answer

    Answer: C

24. Q692009 · 19 Apr 2009

    The resistance of a wire that must be placed parallel with a $12\Omega$ resistance to obtain a combined resistance of $4\Omega$ is

    1. A.$2\Omega$
    2. B.$4\Omega$
    3. C.$6\Omega$
    4. D.$8\Omega$
    Show answer

    Answer: C

25. Q702009 · 19 Apr 2009

    One light year is equal to

    1. A.$9.46\times 10^{-15}\mathrm{m}$
    2. B.$9.46\times 10^{15}\mathrm{m}$
    3. C.$9.46\times 10^{-13}\mathrm{m}$
    4. D.$9.46\times 10^{13}\mathrm{m}$
    Show answer

    Answer: B