Physics · NDA previous year questions

2017 34 questions

1. Q632017 · 23 Apr 2017

   Which one of the following physical quantity has the same unit as that of pressure?

   1. A.Angular momentum
   2. B.Stress
   3. C.Strain
   4. D.Work
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   Answer: B

2. Q652017 · 23 Apr 2017

   Which one of the following physical quantities does NOT affect the resistance of a cylindrical resistor?

   1. A.The current through it
   2. B.Its length
   3. C.The resistivity of the material used in the resistor
   4. D.The area of cross-section of the cylinder
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   Answer: A

3. Q662017 · 23 Apr 2017

   Which one of the following is the correct relation between frequency $f$ and angular frequency $\omega$?

   1. A.$f=\pi \omega$
   2. B.$\omega =2\pi f$
   3. C.$f=2\omega /\pi$
   4. D.$f=2\pi \omega$
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   Answer: B

4. Q682017 · 23 Apr 2017

   If the potential difference applied to an X-ray tube is doubled while keeping the separation between the filament and the target as same, what will happen to the cutoff wavelength?

   1. A.Will remain same
   2. B.Will be doubled
   3. C.Will be halved
   4. D.Will be four times of the original wavelength
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   Answer: C

5. Q692017 · 23 Apr 2017

   Which one of the following statements is true for the relation $F=\frac{G{m}_1{m}_2}{r^2}$? (All symbols have their usual meanings)

   1. A.The quantity G depends on the local value of $g$, acceleration due to gravity
   2. B.The quantity G is greatest at the surface of the Earth
   3. C.The quantity G is used only when earth is one of the two masses
   4. D.The quantity G is a universal constant
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   Answer: D

6. Q702017 · 23 Apr 2017

   If the absolute refractive indices of glass and water are 3/2 and 4/3 respectively, what will be the ratio of velocity of light in glass and water?

   1. A.3 : 4
   2. B.4 : 3
   3. C.8 : 7
   4. D.8 : 9
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   Answer: D

7. Q852017 · 23 Apr 2017

   Why is it difficult to measure the coefficient of expansion of a liquid than solid?

   1. A.Liquids tend to evaporate at all temperatures
   2. B.Liquids conduct more heat
   3. C.Liquids expand too much when heated
   4. D.Their containers also expand when heated
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   Answer: D

8. Q962017 · 23 Apr 2017

   At which place Earth's magnetic field becomes horizontal ?

   1. A.Magnetic meridian
   2. B.Magnetic equator
   3. C.Geographical pole
   4. D.Tropic of Cancer
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   Answer: B

9. Q982017 · 23 Apr 2017

   Suppose a rod is given a negative charge by rubbing it with wool. Which one of the following statements is correct in this case?

   1. A.The positive charges are transferred from rod to wool
   2. B.The positive charges are transferred from wool to rod
   3. C.The negative charges are transferred from rod to wool
   4. D.The negative charges are transferred from wool to rod
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   Answer: D