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 angle of contact for pure water and glass?

[A] 0°
[B] 30°
[C] 180°
[D] 90°

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62. 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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63. What is the unit of Specific gravity?

[A] kg m-3
[B] kg m-2
[C] kg m-1
[D] No units

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64. What is the density of water at 4°?

[A] 1.0
[B] 1.0 × 102 kg m–3
[C] 1.0 × 103 kg m–3
[D] 10 kg m–3

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65. What is the density of air at room temperature?

[A] 1.41
[B] 1.75
[C] 1.29
[D] 1.9

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66. What happens to the viscosity of a liquid with increase in temperature?

[A] it increases
[B] it decreases
[C] it may increase or decrease
[D] No change

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67. 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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68. 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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69. What is second’s pendulum?

[A] simple pendulum whose time period of vibrations is one second
[B] simple pendulum whose time period of vibrations is two seconds
[C] simple pendulum whose time period of vibrations is four seconds
[D] simple pendulum whose time period of vibrations is ten seconds

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70. 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

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