General Science - Physics MCQs

Physics Objective (Multiple Choice) General Knowledge & General Science Questions & Answers for SSC-CGL, UPPSC, UPSC, NDA, CDS and UPSC Civil Services Prelims Examinations.

41. What should be the angle between force and displacement for maximum work to be done?

[A] 0°
[B] 90°
[C] 180°
[D] 30°

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42. Which of the following laws state that the orbits of the planets are ellipses, with the Sun at one focus of the ellipse?

[A] Kepler’s First law
[B] Kepler’s Second law
[C] Kepler’s Third law
[D] None of the above

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43. Which of the following is incorrect:

[A] Gravitational force of attraction is independent of nature of intervening medium
[B] Gravitational forces are central forces
[C] Gravitational forces are non-conservative forces
[D] All of the above

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44. What is the SI unit of acceleration due to gravity?

[A] ms-2
[B] ms-3
[C] Kgms-2
[D] ms-1

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45. Which of the following is true about the effect of altitude on the value of acceleration due to gravity?

[A] The acceleration due to gravity decreases with height
[B] The acceleration due to gravity increases with height
[C] The acceleration due to gravity is not dependent on height
[D] None of the above

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46. At sea level, what is the difference between the value of acceleration due to gravity at the poles and at the equator?

[A] No difference
[B] 9.8 cm s-2
[C] 1.80 cm s-2
[D] None of the above

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47. Which of the following statements is correct about the value of acceleration due to gravity (g) in a light and heavy falling body?

[A] the value of g will be greater in the light body
[B] the value of g will be greater in the heavy body
[C] the value of g will be equal in both the bodies
[D] the value of g depends on the mass

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48. What will be the change in the force of attraction between two bodies if the distance between them is doubled?

[A] No change
[B] Becomes double
[C] Becomes four times
[D] Becomes nine times

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49. What is the height of geo-stationary satellites from the surface of the earth?

[A] 30000 km
[B] 36000 km
[C] 48000 km
[D] 72000 km

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50. The time period of a satellite does not depend on which of the following?

[A] Radius of earth
[B] Height of the satellite
[C] Mass of the satellite
[D] None of the above

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