Gravitation Chapter – Previous Year MCQs JKTET RRB & NTSE Level)

 

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Gravitation Chapter – Previous Year MCQs (RRB & NTSE Level)

1. The force of gravitation between two bodies is directly proportional to
   A. Product of their masses
   B. Sum of their masses
   C. Difference of their masses
   D. Square of their masses
   Answer: A

2. According to Newton’s Law of Gravitation, the gravitational force between two bodies is inversely proportional to
   A. Distance between them
   B. Square of the distance between them
   C. Cube of the distance between them
   D. Mass of the smaller body
   Answer: B

3. The value of acceleration due to gravity on the surface of the Earth is approximately
   A. 8.9 m/s²
   B. 9.8 m/s²
   C. 10.8 m/s²
   D. 9.2 m/s²
   Answer: B

4. The SI unit of universal gravitational constant G is
   A. N m
   B. N/m²
   C. N m²/kg²
   D. kg m²
   Answer: C

5. The weight of a body is maximum at
   A. Equator
   B. Tropic of Cancer
   C. Poles
   D. Center of Earth
   Answer: C

6. If the distance between two objects is doubled, the gravitational force between them becomes
   A. Double
   B. Half
   C. One-fourth
   D. Four times
   Answer: C

7. The gravitational force between two bodies of masses 2 kg and 3 kg separated by 1 m is
   A. 6G
   B. 5G
   C. 3G
   D. 2G
   Answer: A

8. The mass of an object on the Moon is
   A. Less than on Earth
   B. Greater than on Earth
   C. Same as on Earth
   D. Zero
   Answer: C

9. The weight of an object on the Moon is about
   A. One-third of its weight on Earth
   B. One-fourth of its weight on Earth
   C. One-sixth of its weight on Earth
   D. Equal to its weight on Earth
   Answer: C

10. The phenomenon of tides in oceans is mainly due to the gravitational pull of
    A. Sun only
    B. Moon only
    C. Earth only
    D. Moon and Sun
    Answer: D

11. The value of g decreases with
    A. Increase in mass
    B. Increase in height above Earth’s surface
    C. Decrease in height
    D. Increase in density
    Answer: B

12. If a body is taken to the center of the Earth, its weight becomes
    A. Maximum
    B. Double
    C. Half
    D. Zero
    Answer: D

13. The escape velocity on Earth is approximately
    A. 7.9 km/s
    B. 11.2 km/s
    C. 9.8 km/s
    D. 15 km/s
    Answer: B

14. Who discovered the Universal Law of Gravitation?
    A. Galileo Galilei
    B. Albert Einstein
    C. Isaac Newton
    D. Johannes Kepler
    Answer: C

15. The force that keeps planets moving around the Sun is
    A. Magnetic force
    B. Gravitational force
    C. Electrostatic force
    D. Nuclear force
    Answer: B

16. If the mass of one body is tripled, the gravitational force between two bodies will become
    A. Three times
    B. Nine times
    C. One-third
    D. Unchanged
    Answer: A

17. The instrument used to measure atmospheric pressure is
    A. Hydrometer
    B. Lactometer
    C. Barometer
    D. Manometer
    Answer: C

18. The value of g at the surface of the Moon is approximately
    A. 9.8 m/s²
    B. 6.2 m/s²
    C. 1.6 m/s²
    D. 3.2 m/s²
    Answer: C

19. The relation between weight (W), mass (m), and acceleration due to gravity (g) is
    A. W = m/g
    B. W = mg
    C. W = g/m
    D. W = m + g
    Answer: B

20. A freely falling body under gravity experiences
    A. Uniform velocity
    B. Uniform acceleration
    C. No acceleration
    D. Decreasing acceleration
    Answer: B