# 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.

61. What is the density of whole blood at STP?

[A] 3.57 × 103 kg m–3
[B] 1.06 × 103 kg m–3
[C] 5.55 × 103 kg m–3
[D] 2

62. Which of these is correct about Simple Harmonic Motion?

[A] Restoring force is directly proportional to the displacement from mean position
[B] Restoring force is equal to the displacement from mean position
[C] Restoring force is inversely proportional to the displacement from mean position
[D] Restoring force is half of the displacement from mean position

63. Which of the following about S.H.M is correct?

[A] In S.H.M. acceleration is maximum at extreme position
[B] In S.H.M. velocity is minimum at extreme position
[C] Both a and b
[D] None of the above

64. What are the oscillations of a body whose amplitude goes on decreasing with time called as?

[A] Free oscillation
[B] Maintained oscillation
[C] Forced oscillation
[D] Damped oscillation

65. What happens to the time period of a spring pendulum based clock kept on the earth when it is taken to moon?

[A] Time period reduces to half
[B] Time period becomes twice
[C] Time period becomes one-sixth
[D] No change

66. What is the relationship between the time period and effective length of a simple pendulum?

[A] T l
[B] T = √l
[C] T √1/l
[D] T √l

67. What is wavelength of a wave?

[A] square of the distance between two points having the same phase
[B] maximum distance between two points having the same phase
[C] minimum distance between two points having the same phase
[D] None of the above

68. In which of the following the sound cannot travel?

[A] Solids
[B] Liquids
[C] Gases
[D] Vacuum

69. What is the time taken by two consecutive compressions or rarefactions to cross a fixed point in a sound wave known as?

[A] Amplitude
[B] Time period
[C] Angular Frequency
[D] Angular Displacement