# 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. Which of the following factors affect the Surface Tension?

[A] Nature of liquid
[B] Area of Surface
[C] Both a and b
[D] None of the above

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62. When will the height of water in capillary tube be minimum?

[A] When water temperature is 0° C
[B] When water temperature is 4° C
[C] When water temperature is -4° C
[D] None of the above

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63. What will be the general value of angle of contact when the liquid does not wet the solid?

[A] acute
[B] obtuse
[C] zero
[D] 90°

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64. Which of the following is NOT an example of capillary action?

[A] Rise of ink in the fine pores of blotting paper
[B] soaking of water by a towel
[C] Wood swells in rainy season due to rise of moisture
[D] None of the above

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65. Which of the following represents the Density of a material?

[A] Mass/weight
[B] Mass/Length
[C] Mass/Volume
[D] Mass/Area

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66. 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

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67. What is the SI unit of viscosity?

[A] candela
[B] poiseiulle
[C] Newton/m
[D] No units

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68. 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

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69. What is the oscillation in which the loss of oscillator is compensated by the supplying energy from an external source known as?

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

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70. What happens to the frequency of the pendulum if it is suspended from the ceiling of the lift moving downward with acceleration equal to acceleration due to gravity ?

[A] it increases
[B] it decreases
[C] No change
[D] No oscillation

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