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.

31. Which of the following units is the smallest in terms of length?

[A] micron
[B] nanometer
[C] fermi
[D] angstrom

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32. Which of the following physical quantities do not have any unit of measurement?

[A] Universal Constant of Gravitation
[B] Specific Gravity
[C] Tension
[D] Plancks constant

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33. Light year is a unit of which of these following?

[A] distance
[B] time
[C] pressure
[D] power

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34. What is the slope of the velocity-time graph when an object moves with constant negative acceleration, having positive initial velocity?

[A] 90°
[B] more than 90°
[C] less than 90°
[D] 0°

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35. Which of the following is correct about Kinetic energy during the projectile motion?

[A] it is minimum at the point of projection
[B] it is minimum at the highest point
[C] it is maximum at the highest point
[D] it is minimum at the point of reaching the ground

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36. Which of the following is/are independent of mass during the projectile motion?

[A] Time of Flight
[B] Horizontal Range
[C] Maximum Height
[D] All of the above

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37. Which of the following is correct about the coefficient of limiting friction between any two surfaces in contact?

[A] it is equal to twice the tangent of angle of friction
[B] it is equal to twice the sine of angle of friction
[C] it is equal to the tangent of angle of friction
[D] it is equal to the sine of angle of friction

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38. Angle of friction is _______:

[A] equal to angle of repose
[B] equal to twice the angle of repose
[C] is greater than the angle of repose
[D] is less than the angle of repose

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39. Which of the following is NOT correct about an inelastic collision?

[A] Linear momentum is conserved
[B] Kinetic energy is conserved
[C] Total energy is conserved
[D] Some or all the forces involved may be non-conservative in nature

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40. What is the effect on velocities of the two bodies of equal masses when they undergo elastic collision in one dimension?

[A] remains same
[B] gets interchanged
[C] becomes twice of the original velocity
[D] becomes half of the original velocity

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