Physics · NDA previous year questions

2009 45 questions

1. Q902009 · 19 Apr 2009

   Which one of the following is the amount of heat given up when $20\mathrm{g}$ of steam at $100^{\circ }\mathrm{C}$ is condensed and cooled to $20^{\circ }\mathrm{C}$ ?

   1. A.$10000\mathrm{cal}$
   2. B.$11400\mathrm{cal}$
   3. C.$12400\mathrm{cal}$
   4. D.$13600\mathrm{cal}$
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   Answer: C

2. Q912009 · 19 Apr 2009

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

   1. A.Conduction only
   2. B.Convection only
   3. C.Radiation
   4. D.Both conduction and convection
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   Answer: B

3. Q922009 · 19 Apr 2009

   On planet Earth, there is no centrifugal force at the

   1. A.Equator
   2. B.Tropic of Cancer
   3. C.Tropic of Capricorn
   4. D.Poles
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   Answer: D

4. Q1052009 · 19 Apr 2009

   Directions : Each of the following items consists of two statements, one labelled as the 'Assertion (A)' and the other as 'Reason (R)'. Examine the two statements carefully and select the answer using the codes given below. Assertion (A) : Two artificial satellites having different masses and revolving around the Earth in the same circular orbit have same speed. Reason (R) : The speed of a satellite is directly proportional to the radius of its orbit.

   1. A.Both A and R are individually true and R is the correct explanation of A
   2. B.Both A and R are individually true but R is not the correct explanation of A
   3. C.A is true but R is false
   4. D.A is false but R is true
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   Answer: C