General Science - Physics

Welcome to General Science – Physics MCQ series of GKToday. As of today February 26, 2020, this series has 590 Questions. You may purchase a PDF E-Book compilation comprising all these questions and their answers with explanation from this link.

41. What is the upward force experienced by a body, when it is immersed in a fluid, known as?
[A] Tangential force
[B] Buoyant force
[C] Centrifugal force
[D] Hydraulic force

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42. What happens to a body when its density is equal to the density of the fluid?
[A] it floats
[B] it sinks
[C] it remains suspended
[D] None of the above

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43. What will be the buoyant force acting on the stone, on being immersed in water, if it displaces 100gms of water?
[A] 1000 gm-weight
[B] 100 gm-weight
[C] 10 gm-weight
[D] 1 gm-weight

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44. What will be the change in the height of water in a capillary tube in stationary condition on earth if the same tube is taken in a lift going downward with acceleration?
[A] height increases
[B] height decreases
[C] Remains same
[D] can decrease or increase

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45. 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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46. What is the relationship between excess pressure and the radius of the bubble?
[A] are equal in value
[B] inversely proportional to each other
[C] directly proportional to each other
[D] no relationship

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47. What is the angle of contact for pure water and glass?
[A] 0°
[B] 30°
[C] 180°
[D] 90°

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48. Which of the following is the S.I. unit of density?
[A] m-2
[B] m-3
[C] kg m-2
[D] kg m-3

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49. 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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50. What do we call the maximum velocity of a fluid in a tube for which the flow remains streamlined?
[A] Hyper velocity
[B] critical velocity
[C] stream velocity
[D] laminar velocity

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