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 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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42. 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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43. The value of acceleration due to gravity is minimum on which of these planets?

[A] Mars
[B] Jupiter
[C] Mercury
[D] Neptune

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44. What is the value of Universal Gravitational Constant?

[A] 6.67×10-9 N–m2 kg–2
[B] 6.67×10-10 N–m2 kg–2
[C] 6.67×1011 N–m2 kg–2
[D] 6.67×10-11 N–m2 kg–2

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45. 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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46. What is the time period for a satellite orbiting close to the surface of earth?

[A] 84.6 minutes
[B] 72.4 minutes
[C] 44.8 minutes
[D] 24 hours

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47. By how much the orbital velocity of Moon has to increase for it to cease to remain the earth’s satellite?

[A] 2 times
[B] 3 times
[C] √2 times
[D] √3 times

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48. The distance of Neptune and Saturn from sun are nearly 1013 and 1012 meters respectively. Assuming that they move in circular orbits, what will be the ratio of their periodic times?

[A] 40
[B] 10√10
[C] 20√20
[D] 30√30

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49. What is the name given to the linear strain produced in the direction of deforming force?

[A] Linear strain
[B] Longitudinal strain
[C] Directional strain
[D] Zero strain

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50. What is Young’s Modulus?

[A] ratio of longitudinal strain to normal stress
[B] product of normal stress of longitudinal strain
[C] ratio of normal stress to longitudinal strain
[D] ratio of normal stress to lateral strain

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