NEET Physics Pressure Density Pascals Law and Archimedes Principle MCQs Set A

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MCQ for Full Syllabus Physics Pressure Density Pascals Law and Archimedes Principle

Full Syllabus Physics students should refer to the following multiple-choice questions with answers for Pressure Density Pascals Law and Archimedes Principle in Full Syllabus.

Pressure Density Pascals Law and Archimedes Principle MCQ Questions Full Syllabus Physics with Answers


Question:  Liquid pressure depends upon

a) height of the liquid column

b) directions

c) shape of the liquid surface

d) area of the liquid surface

Answer: height of the liquid column

 

Question: Hydraulic lifts and hydraulic brakes are based on

a) Pascal's law

b) Bernoulli's principle

c) Archimedes' principle

d) Stoke's law

Answer: Pascal's law

 

Question: According to archimedes' principle, loss of weight of a body immersed in a liquid is equal to

a) weight of the liquid displaced

b) weight of the total liquid

c) weight of the body

d) None of these

Answer: weight of the liquid displaced

 

Question:  A vessel with water is placed on a weighing pan and it reads 600 g. Now a ball of mass 40 g and density 0.80 g cm–3 is sunk into the water with a pin of negligible volume, as shown in figure keeping it sunk. The weighting pan will show a reading

a) 650 g

b) 632 g

c) 550 g

d) 600 g

Answer: 650 g

 

Question:  _________ and _________ play the same role in case of fluids as force and mass play in case of solids.

a) Pressure and density

b) Thrust and volume

c) Thrust and density

d) Pressure and thrust

Answer: Pressure and density

 

Question: Pressure applied to enclosed fluid is

a) transmitted unchanged to every portion of the fluid and wall of containing vessel

b) increased in proportion to the mass of the fluid and then transmitted

c) diminished and transmitted to wall of container

d) increased and applied to every part of the fluid

Answer: transmitted unchanged to every portion of the fluid and wall of containing vessel

 

Question: The pressure at the bottom of a tank containing a liquid does not depend on

a) area of the bottom surface

b) nature of the liquid

c) height of the liquid column

d) acceleration due to gravity

Answer:  area of the bottom surface

 

Question:

a)

b)

c)

d) None of these

Answer:

 

Question:  A candle of diameter d is floating on a liquid in a cylindrical container of diameter D (D >> d) as shown in figure. If it is burning at the rate of 2 cm/hour then the top of the candle will

a) fall at the rate of 2 cm/hour

b) go up at the rate of 1 cm/hour

c) fall at the rate of 1 cm/hour

d) remain at the same height

Answer: fall at the rate of 2 cm/hour

 

Question: Specific gravity of a body is numerically equal to

a) density of body in water

b) relative density of the body

c) weight of the body in water

d) weight of the body in air

Answer:  density of body in water

 

Question:

a)

b)

c)

d)

Answer:

 

More Questions.....................................

 

Question: Assertion: A small iron needle sinks in water while a large iron ship floats.
Reason: The shape of iron needle is like a flat surface while the shape of a ship is that which makes it easier to float.

a) Assertion is correct, reason is incorrect

b) Assertion is incorrect, reason is correct

c) Assertion is correct, reason is correct; reason is not a correct explanation for assertion

d) Assertion is correct, reason is correct; reason is a correct explanation for assertion

Answer: Assertion is correct, reason is incorrect

 

Question: Consider an iceberg floating in sea water. The density of sea water is 1.03 g/cc and that of ice is 0.92 g/cc. The fraction of total volume of iceberg above the level of sea water is near by

a) 11%

b) 8%

c) 3%

d) 1.8%

Answer: 11%

 

Question: A block of ice floats on a liquid of density 1.2 in a beaker then level of liquid when ice completely melt

a) rises

b) remains same

c) lowers

d) None of these

Answer:  rises

 

Question:

a) 12 kg

b) 10 kg

c) 14 kg

d) 15 kg

Answer: 12 kg

 

Question: A vessel contains oil (density = 0.8 gm/cm3) over mercury (density = 13.6 gm/cm3). A homogeneous sphere floats with half of its volume immersed in mercury and the other half in oil. The density of the material of the sphere in gm/cm3 is

a) 7.2

b) 12.8

c) 6.4

d) 3.3

Answer: 7.2

 

Question: In a hydraulic lift, compressed air exerts a force F1 on a small piston having a radius of 5 cm. This pressure is transmitted to a second piston of radius 15 cm. If the mass of the load to be lifted is 1350 kg, find the value of F1 ? The pressure necessary to accomplish this task is

a) 1.9 × 105 Pa

b) 1.4 × 105 Pa

c) 2 × 105 Pa

d) None of these

Answer:  1.9 × 105 Pa

 

Question: Assertion: The apparent weight of a floating body is zero.
Reason: The weight of the block acting vertically downwards is balanced by the buoyant force acting on the block upwards.

a) Assertion is correct, reason is correct; reason is a correct explanation for assertion.

b) Assertion is correct, reason is correct; reason is not a correct explanation for assertion

c) Assertion is correct, reason is incorrect

d) Assertion is incorrect, reason is correct

Answer: Assertion is correct, reason is correct; reason is a correct explanation for assertion.

 

Question: The force acting on a window of area 50 cm × 50 cm of a submarine at a depth of 2000 m in an ocean, interior of which is maintained at sea level atmospheric pressure is (Density of sea water = 103 kgm–3, g = 10 ms–2)

a) 5 × 106 N

b) 5 × 105 N

c) 106 N

d) 25 × 106 N

Answer: 5 × 106 N

 

Question: A concrete sphere of radius R has a cavity of radius r which is packed with sawdust. The specific gravities of concrete and sawdust are respectively 2.4 and 0.3 for this sphere to float with its entire volume submerged under water. Ratio of mass of concrete to mass of sawdust will be

a) 4

b) 3

c) zero

d) 8

Answer:  4

 

Question:

a)

b) remain stationary (relative to liquid)

c) move down (relative to liquid)

d) move up (relative to liquid)

Answer:

 

Question:  A cubical box is to be constructed with iron sheets 1 mm in thickness. What can be the minimum value of the external edge so that the cube does not sink in water?

a) 4.8 cm

b) 5.8 cm

c) 6.9 cm

d) 7.3 cm

Answer: 4.8 cm

 

Question:  In rising from the bottom of a lake, to the top, the temperature of an air bubble remains unchanged, but its diameter gets doubled. If h is the barometric height (expressed in m of mercury of relative density r) at the surface of the lake, the depth of the lake is

a)

b)

c)

d)

Answer:

 

Question:

a)

b)

c) 125 N

d) 250 N

Answer:

 

Question:  The two thigh bones, each of cross-sectional area 10 cm2 support the upper part of a human body of mass 40 kg. Estimate the average pressure sustained by the bones. Take g = 10 m/s2

a) 2 × 105 N/m2

b) 2 × 107 N/m2

c) 5 × 104 N/m2

d) 3 × 106 N/m2

Answer:  2 × 105 N/m2

 

Question:

a) 0.98 m

b) 0.99 m

c) 0.97 m

d) 0.94 m

Answer:  0.98 m

 

Question:

a)

b)

c)

d)

Answer:

 

Question:  A boy can reduce the pressure in his lungs to 750 mm ofmercury. Using a straw he can drink water from a glass upto the maximum depth of (atmospheric pressure = 760 mm of mercury; density of mercury = 13.6 gcm–3)

a) 13.6 cm

b) 9.8 cm

c) 76 cm

d) 10 cm

Answer: 13.6 cm

 

Question:  A wooden block, with a coin placed on its top, floats in water as shown in fig. the distance l and h are shown there. After some time the coin falls into the water. Then

a)

b)

c)

d)

Answer:

 

Question:

a)

b)

c)

d)

Answer:

 

Question:  A sphere of solid material of specific gravity 8 has a concentric spherical cavity and just sinks in water. The ratio of radius of cavity to that of outer radius of the sphere must be

a)

b)

c)

d)

Answer:

 

Question:  A vessel containing water is given a constant acceleration ‘a’ towards the right along a straight horizontal path. Which of the following diagrams represents the surface of the liquid ?

a)

b)

c)

d) None of these

Answer:

 

Question:  An iceberg is floating in ocean. What fraction of its volume is above the water ? (Given : density of ice = 900kg/m3 and density of ocean water = 1030 kg/m3)

a)

b)

c)

d)

Answer:

 

Question:  A cone full of water, is placed on its side on a horizontal table, the thrust on its base is x times the weight of the contained fluid, where 2a is the vertical angle of the cone. Find the value of x.

a)

b)

c)

d)

Answer:

 

Question: Assertion : Imagine holding two identical bricks under water. Brick A is completely submerged just below the surface of water, while Brick B is at a greater depth. The magnitude of force exerted by the person (on the brick) to hold brick B in place is the same as magnitude of force exerted by the person (on the brick) to hold brick A in place.

Reason : The magnitude of buoyant force on a brick completely submerged in water is equal to magnitude of weight of water it displaces and does not depend on depth of brick in water.

a) Assertion is correct, reason is correct; reason is a correct explanation for assertion

b) Assertion is correct, reason is correct; reason is not a correct explanation for assertion

c) Assertion is correct, reason is incorrect

d) Assertion is incorrect, reason is correct

Answer: Assertion is correct, reason is correct; reason is a correct explanation for assertion

 

MCQs for Pressure Density Pascals Law and Archimedes Principle Physics Full Syllabus

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