MCQOPTIONS
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MCQOPTIONS
This section includes 101 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The weight of a body in a frame of reference is equal and opposite to the force required to prevent it? |
| A. | from providing a velocity equal to its instantaneous velocity, |
| B. | from accelerating from rest in that frame of reference. |
| C. | from an elastic collision |
| D. | from increasing its momentum. |
| Answer» C. from an elastic collision | |
| 2. |
The Universal law of gravitation must apply to? |
| A. | The earth and the moon. |
| B. | The planets around the Sun. |
| C. | Any pair of bodies. |
| D. | The earth and the apple. |
| Answer» D. The earth and the apple. | |
| 3. |
If the radius of the earth were to shrink and its mass were to remain the same, the acceleration due to gravity on the surface of the earth with? |
| A. | decrease |
| B. | zero |
| C. | increase |
| D. | remain the same |
| Answer» D. remain the same | |
| 4. |
At the surface of earth an object falling freely experiences an acceleration of? |
| A. | 9.1 ms-2 |
| B. | 9.4 ms-2 |
| C. | 9.6 ms-2 |
| D. | 9.8 ms-2 |
| Answer» E. | |
| 5. |
The acceleration of the moon is because of the? |
| A. | Gravitational force exerted on the earth by the moon |
| B. | Gravitational force exerted on the moon by the earth. |
| C. | Gravitational force exerted by the Sun. |
| D. | Gravitational force exerted by the planets |
| Answer» C. Gravitational force exerted by the Sun. | |
| 6. |
g' decrease with? |
| A. | amplitude |
| B. | horizontal displacement |
| C. | altitude |
| D. | weight |
| Answer» D. weight | |
| 7. |
The radius of earth is? |
| A. | RE = 6.45 X 106 m |
| B. | RE = 7.45 X 106 m |
| C. | RE = 9.45 x 106 m |
| D. | RE = 6.38)< 106 m |
| Answer» E. | |
| 8. |
The distance from the center of earth to the center of the moon' is called as? |
| A. | Orbital length of the earth. |
| B. | Orbital radius of the earth. |
| C. | Orbital length of the moon. |
| D. | Orbital radius of the moon. |
| Answer» E. | |
| 9. |
In order to derive the law of gravitation, Newton assume that the moon's orbit is? |
| A. | Circular |
| B. | Straight |
| C. | Uniform |
| D. | Parabolic |
| Answer» B. Straight | |
| 10. |
The force of gravity on a body varies slightly from place to place on the earth for two reason. (i) shape of earth and (ii) ? |
| A. | the rotation of the earth |
| B. | the mass of the earth |
| C. | the circumference of the earth |
| D. | All of these |
| Answer» B. the mass of the earth | |
| 11. |
Gravitational force is responsible for? |
| A. | Keeping planets in their radii. |
| B. | Keeping planets on theft axes. |
| C. | For the motion of planets around the Sun. |
| D. | None of these. |
| Answer» D. None of these. | |
| 12. |
what Newton made the hypothesis? |
| A. | That every body in the universe exerts a gravitational force on every other body. |
| B. | That heavier body in the universe exerts a gravitational force on the lighter bodies. |
| C. | That gravitational force only exerts on the bodies on earth. |
| D. | That only the Sun gravitational force is responsible for all the motion in this universe. |
| Answer» B. That heavier body in the universe exerts a gravitational force on the lighter bodies. | |
| 13. |
in 1666, Newton concluded that the force which caused an apple to fall to the ground and the force that kept the moon in its orbit around the earth is the ? |
| A. | "Weight called as ""Weightlessness""" |
| B. | "Acceleration called as ""Centripetal acceleration""." |
| C. | "Universal force called as ""Artificial Gravity""." |
| D. | "Universal force called as ""Gravitation""." |
| Answer» E. | |
| 14. |
The mass of the body will? |
| A. | Remain same everywhere. |
| B. | Change from place to place. |
| C. | Be equal to its weight. |
| D. | Greater at mountains |
| Answer» B. Change from place to place. | |
| 15. |
The weight of an object in a satellite orbiting around the earth is? |
| A. | Greater than the actual weight |
| B. | Zero |
| C. | Less than the actual weight |
| D. | Actual weight |
| Answer» C. Less than the actual weight | |
| 16. |
The motion of falling bodies towards earth is due to the? |
| A. | Gravitational rotation. |
| B. | Weightlessness |
| C. | Acceleration due to gravity. |
| D. | Gravitational force. |
| Answer» E. | |
| 17. |
Newton apply Huygens's formula to calculate? |
| A. | Centripetal acceleration of the earth. |
| B. | Centrifugal acceleration of the Sun. |
| C. | Centripetal acceleration of the moon. |
| D. | Centripetal acceleration of the Satellite. |
| Answer» D. Centripetal acceleration of the Satellite. | |
| 18. |
The present accepted value of the universal gravitational constant 0 = 6.673 x 10-11 Nm2/Kg2 was obtained by? |
| A. | Lord Cavendish |
| B. | Poynting |
| C. | P. R. Heyl and P.Chizano Wski |
| D. | Boyle |
| Answer» D. Boyle | |
| 19. |
The magnitude of the weight is expressed in the units of? |
| A. | Mass (Kilogram) |
| B. | Displacement (meter) |
| C. | Force (Newton) |
| D. | None of these |
| Answer» D. None of these | |
| 20. |
Astronauts experiences weightlessness when their spacecraft is? |
| A. | Orbiting around the earth. |
| B. | Orbiting around its axis |
| C. | Orbiting around the circle |
| D. | Orbiting around the Sun. |
| Answer» B. Orbiting around its axis | |
| 21. |
The weight of a body is not a fixed quantity. It depends upon the location as well as upon? |
| A. | The motion of the frame of reference. |
| B. | The shape of the earth. |
| C. | The external force on the body. |
| D. | The rotation of the body. |
| Answer» B. The shape of the earth. | |
| 22. |
"The force on the object placed near the surface is given by the mass "m" of the object multiplied by the acceleration due to gravity, which is equal to its?" |
| A. | "acceleration ""a""." |
| B. | "weight 'W""." |
| C. | "momentum ""p""." |
| D. | None of these. |
| Answer» C. "momentum ""p""." | |
| 23. |
The weight of the body is given by? |
| A. | W = ms |
| B. | W = ma |
| C. | W = mv |
| D. | W = mg |
| Answer» E. | |
| 24. |
The earth's gravitational pull is just balanced by the centripetal force resulting into? |
| A. | Gravitational force. |
| B. | Artificial Gravity. |
| C. | Weightlessness |
| D. | Centripetal acceleration. |
| Answer» D. Centripetal acceleration. | |
| 25. |
The apparent weight of a person standing in a elevator which is moving down with uniform acceleration will be? |
| A. | Twice the weight of on the surface of the earth. |
| B. | same as the weight on the surface of the earth. |
| C. | Greater than its weight on the surface of the earth |
| D. | less than its weight on the surface of the earth |
| Answer» E. | |
| 26. |
An artificial gravity can be created in the spacecraft ? |
| A. | By rotating it around the earth. |
| B. | By spinning it around earth's axis. |
| C. | By spinning it around its, own axis. |
| D. | By spinning it around its moon's axis. |
| Answer» D. By spinning it around its moon's axis. | |
| 27. |
An astronaut or other body in the spacecraft is said to be weightlessness or? |
| A. | In a state of motion |
| B. | In a state of rest. |
| C. | "In a state of ""zero g""" |
| D. | "In a state of ""zero a""" |
| Answer» D. "In a state of ""zero a""" | |
| 28. |
The equation for the mass of earth is? |
| A. | ME = REg2/G2 |
| B. | ME = RE2g/G |
| C. | ME = RE2g/G |
| D. | ME = RE2g/G |
| Answer» C. ME = RE2g/G | |
| 29. |
The mass of earth is? |
| A. | ME = 6.98 X 1024 Kg |
| B. | ME = 5.98 X 1024 Kg |
| C. | ME = 7.98 X 1024 Kg |
| D. | ME = 9.98 x 1024 Kg |
| Answer» C. ME = 7.98 X 1024 Kg | |
| 30. |
The force exerted on body A by body B is always directed towards body B, and acts? |
| A. | along the line joining their centers. |
| B. | along the line joining their centers. |
| C. | along the line joining their centers. |
| D. | None of these. |
| Answer» B. along the line joining their centers. | |
| 31. |
Weight of a body is a? |
| A. | scalar quantity |
| B. | None of these |
| C. | vector quantity |
| D. | Negative quantity |
| Answer» D. Negative quantity | |
| 32. |
The magnitude of the gravitational force with which the earth attracts the object of mass M, towards its center, is given by? |
| A. | F = G M Me / Re2 |
| B. | F = G Me / Re2 |
| C. | F = G M2 Me / Re2 |
| D. | F = G2 M Me / Re2 |
| Answer» B. F = G Me / Re2 | |
| 33. |
"""C"" is a universal gravitational constant and its value is?" |
| A. | G = 6.743 x 10-11 Nm2/Kg |
| B. | G = 6.673>< 10-11 N-m2/Kg |
| C. | G = 6.973 x 10-11 N-m2/Kg |
| D. | G = 6.873 x 10-11 N-m2/Kg |
| Answer» C. G = 6.973 x 10-11 N-m2/Kg | |
| 34. |
The value of G was first determined by? |
| A. | Poynting in 1901 |
| B. | Lord Cavendish in 1798. |
| C. | Boyle in 1917. |
| D. | P. R. Heyl in 1998. |
| Answer» C. Boyle in 1917. | |
| 35. |
According to the Newton"s Universal law of gravitation, "Every body in the universe attracts every other body with a force which is?" |
| A. | directly proportional to the product of their masses. |
| B. | directly proportional to the product of forces. |
| C. | directly proportional to the distance between them. |
| D. | directly proportional to the product of their radius. |
| Answer» B. directly proportional to the product of forces. | |
| 36. |
If a man goes to a height equal to the radius of the earth from its surface, his weight relative to that of earth would become? |
| A. | twice |
| B. | same |
| C. | half |
| D. | one-fourth |
| Answer» E. | |
| 37. |
F on A by B = —F on B by A. These two gravitational forces constitute an action-reaction pair in accordance with Newton's? |
| A. | Third law of motion |
| B. | Second law of motion |
| C. | First law of motion |
| D. | Law of Universal Gravitation. |
| Answer» B. Second law of motion | |
| 38. |
If the earth is 1/4th of its present distance from the sun, the duration of the year would be |
| A. | 1/4 of the present year |
| B. | 1/6 of the present year |
| C. | 1/8 of the present year |
| D. | 1/16 of the present year |
| Answer» D. 1/16 of the present year | |
| 39. |
If the value of gravitational acceleration at a height h above the Earth's surface is the same as that at a depth d below the Earth's surface (with both h and d small compared to the Earth's radius R), then |
| A. | h = d2 / R |
| B. | h = d / 2 |
| C. | h = d |
| D. | h = 2 d |
| Answer» C. h = d | |
| 40. |
A thief stole a box with valuable article of weight 'W' and jumped down a wall of height h. Before he reach the ground he experienced a load o |
| A. | zero |
| B. | W / 2 |
| C. | W |
| D. | 2 W |
| Answer» B. W / 2 | |
| 41. |
A planet is moving around the Sun in a circular orbit of circumference C. The work done on the planet by the gravitational force F of the Sun is |
| A. | F/C |
| B. | FC |
| C. | Zero |
| D. | FC/2 |
| Answer» D. FC/2 | |
| 42. |
The ratio of the time periods for two satellites of equal mass in circular orbits of radii R and 9 R is |
| A. | 1:27 |
| B. | 27:01:00 |
| C. | 9:01 |
| D. | 1:09 |
| Answer» B. 27:01:00 | |
| 43. |
The period of a satellite in a circular orbit of radius R is T. The period of another satellite in circular orbit of radius 4R is |
| A. | T/4 |
| B. | 8T |
| C. | 2T |
| D. | T/8 |
| Answer» C. 2T | |
| 44. |
Kepler's second law regarding constancy of arial velocity of a planet is a consequence of the law of conservation of |
| A. | angular momentum |
| B. | energy |
| C. | none of these |
| D. | linear momentum |
| Answer» B. energy | |
| 45. |
If the radius of the Earth were increased by a factor of 4 and its mass remained the same, then the acceleration due to gravity on the Earth would |
| A. | increase by a factor of 16 |
| B. | increase by a factor of 4 |
| C. | reduce by a factor of 16 |
| D. | reduce by a factor of 4 |
| Answer» D. reduce by a factor of 4 | |
| 46. |
If the gravitational force between two objects were proportional to 1/R (and not as 1/R2) where R is separation between them, then a particle in circular orbit under such a force would have its orbital speed v proportional to |
| A. | R0 |
| B. | 1/R2 |
| C. | R |
| D. | 1/R |
| Answer» B. 1/R2 | |
| 47. |
The earth is not a perfect sphere, but it bulges at the? |
| A. | Center |
| B. | Poles |
| C. | Equator |
| D. | North Pole |
| Answer» D. North Pole | |
| 48. |
The earth's gravity acts on both the spacecraft and the bodies in it, giving each? |
| A. | The same torque. |
| B. | The same centrifugal acceleration. |
| C. | The same acceleration. |
| D. | Gravitational force. |
| Answer» D. Gravitational force. | |
| 49. |
If a body is taken from a pole to the equator its distance from the center of the earth will? |
| A. | Increases |
| B. | Decreases |
| C. | Constant |
| D. | None of these. |
| Answer» B. Decreases | |
| 50. |
Artificial gravity is produced in a space-craft to? |
| A. | decrease the weight of the astronaut |
| B. | increase the weight of the astronaut |
| C. | overcome the force of friction |
| D. | overcome the state of.weight-lessness. |
| Answer» E. | |