Choose the Correct answer.
1. Attractive force between all masses is known as
a) force of gravitation b) Normal force c) Force of attraction d) None
2. Earth exists in which galaxy of Local group of Galaxies.
a) Andromeda Galaxy b) Milky Way c) Solar Galaxy d) Local Galaxy
3. Gravity is ……. Force.
a) contact force b) non-contact force c) field force d) both b&c
4. The value of gravitational constant G in Newton’s law of universal gravitation
a) 6.67×10-11Nm²/kg² b) 6.4×10⁶ Nm²/kg² c) 6×10²⁴ Kg d) 6.67×10¹¹ Nm²/kg²
5. When the distance between two bodies is increased four time then gravitational force between them becomes
a) decrease four times b) Increase four times c) decrease 16 times d) increase 16 times
6. If masses of both bodies are doubled then gravitational force between two bodies becomes
a) F’ = 4F b) F’ = 1/4F c) F’ = 2F d) F’ = 1/2F
7. Which statement is not correct about Gravitational constant G ?
a) It’s value is determined experimentally b) It’s value is 6.67×10-11Nm²/kg²
c) It’s value depends upon medium between bodies d) It’s value is very much small in magnitude
8. A body of mass 1kg pulls up the earth by a force of
a) 1.63 N b) 9.8 N c) 10.9 N d) It does pull the earth upward
9. Light from sun takes how much time to reach earth?
a) 100 seconds b) 5 minutes c) 8 minutes d) 500 seconds
10. When distance between two bodies is halved , then gravitational force becomes
a) Decrease 2 times b) Increase 2 times c) decrease 4 times d) increase 4 times
11. The mass of earth is
a) 6.4×10⁶ kg b) 6×10²⁴ kg c) 1.99× 10²⁷ kg d) 3.84× 10⁸ kg
12. N/kg is the unit of
a) Gravitational constant b) acceleration due to gravity c) Radius d) Velocity
13. Largest planet in our solar system is
a) Mercury b) Earth c) Saturn d) Jupiter
14. Which is hottest planet of solar system.
a) Jupiter b) Mercury c) Venus d) Saturn
15. The value of gravitational constant G on the surface of moon is
a) 6.67×10¹¹ Nm²/kg² b) 9.8m/s² c) 1.63m/s² d) 6.67×10-11Nm²/kg²
16. Jupiter is …… Times larger than earth .
a) 30 times b) 300 times c) 50 times d) 100 times
17. If mass of moon is doubled keeping its radius constant the value of gravitational acceleration becomes
a) 3.26 m/s² b) 0.815 m/s² c) 1.63 m/s² d) None
18. If radius of earth is halved keeping it’s mass constant then value of g
a) Remains constant b) increase four times c) decrease four times d) Becomes half
19. The unit of gravitational acceleration is
a) m/s² b) m/s c)N/kg d) both a&c
20. Which planet has highest value of acceleration due to gravity
a) Jupiter b) Mercury c) Venus d) Earth
21. Which of the following Quantities remains same throughout the earth,
a) Mass b) weight c) gravitational acceleration d) all of these
22. First artificial satellite was sent into Earth’s orbit in
a) 1967 b) 1979 c) 1989 d) 1957
23. If speed of satellite becomes more than it’s orbital speed it will
a) escape the earth b) fall towards earth c) No effect d) None
24. Constant tangential speed of satellite is called
a) Critical velocity b) orbital velocity c) tangential speed d) None
25. The orbit of geostationary satellite is
a) 3000 km b) 35.9 × 10⁶ m c) 3×10⁵ m d) None
26. The orbital speed of earth around sun is
a) 30m/s b) 30km/s c) 300m/s d) None of these
27. What is mass of an object on Jupiter if weight is100N on earth ,
a) 10.20 kg b) 9.8 kg c) 100kg d) none of these
28. What will be effect on orbital speed of satellite if mass of satellite is doubled,
a) increase b) decrease c) No change d) none of these
29. What will be effect on orbital speed of Satellite if radius of earth is increased four times,
a) decrease 2 times b) increase 2 times c) decrease 4 times d) increase 4 times
30. If earth is shrunk keeping mass constant, value of gravitational acceleration is
a) increase b) decrease c) no effect d) None
31. Gravity is independent of
a) Mass of earth b) Radius of earth c) Mass of the body
d) depends upon all of these
32. Velocity of artificial satellites is dependent on
a)mass of earth b) Distance of satellite from earth c) Gravitational constant G d) All of these
33. The unit of Gravitational constant G in terms of base units is
a)m³/kg.s² b)Nm²/Kg² c)Kg²/Nm² d)All of these
34. The weight of body decreases ……… Times when it is moved from earth to Moon
a) two times b) 6 times c)1.63 times d) 9.8 times
35. Which of the following Kingdom lacks cell wall in their cells.
a) Monera b) Plantae c) Fungi d) Animalia
36. The speed of light is
a) 3×10⁸ m/s b) 3×10⁸ km/h c) both a & b d) none of these
