Refer to JEE Physics Mechanical Properties Of Fluids MCQs Set B provided below. JEE (Main) Full Syllabus Physics MCQs with answers available in Pdf for free download. The MCQ Questions for Full Syllabus Physics with answers have been prepared as per the latest syllabus, JEE (Main) books and examination pattern suggested in Full Syllabus by JEE (Main), NCERT and KVS. Multiple Choice Questions for Mechanical Properties Of Fluids are an important part of exams for Full Syllabus Physics and if practiced properly can help you to get higher marks. Refer to more Chapter-wise MCQs for JEE (Main) Full Syllabus Physics and also download more latest study material for all subjects
MCQ for Full Syllabus Physics Mechanical Properties Of Fluids
Full Syllabus Physics students should refer to the following multiple-choice questions with answers for Mechanical Properties Of Fluids in Full Syllabus. These MCQ questions with answers for Full Syllabus Physics will come in exams and help you to score good marks
Mechanical Properties Of Fluids MCQ Questions Full Syllabus Physics with Answers
Question: The radius of a soap bubble is r. The surface tension of soap solution is ‘S’. Keeping temperature constant, the radius of the soap bubble is doubled. The energy necessary for this will be
- a)
- b)
- c)
- d)
Answer:
Question: The surface tension of a liquid is 5 N/m. If a film is held on a ring of area 0.02 m2, its surface energy is about
- a) 2 × 10–1 J
- b) 3 × 10–1 J
- c) 2.5 × 10–2 J
- d) 5 × 10–2 J
Answer: 2 × 10–1 J
Question: Two soap bubbles having radii 3 cm and 4 cm in vacuum, coalesce under isothermal conditions. The radius of the new bubble is
- a) 5 cm
- b) 7 cm
- c) 3.5 cm
- d) 1 cm
Answer: 5 cm
Question: The excess pressure in a soap bubble is double that in other one. The ratio of their volume is
- a) 1 : 8
- b) 1 : 4
- c) 1 : 1
- d) 1 : 2
Answer: 1 : 8
Question: The work done to break a spherical drop of radius R in n drops of equal size is proportional to
- a)
- b)
- c)
- d)
Answer:
Question: The kerosene oil rises up in the wick of a lamp
- a) Due to capillaries formed in the wick
- b) Because the wick attract s the oil
- c) Because wick decreases the surface tension of oil
- d) None of these
Answer: Due to capillaries formed in the wick
Question: Ploughing help to retain water by soil
- a) By breaking capillaries
- b) None of these
- c) By creating capillaries
- d) By turning the soil upside down
Answer: By breaking capillaries
Question: A capillary tube of radius r is immersed in a liquid and mass of liquid, which rises up in it is M. If the radius of tube is doubled, then the mass of liquid which will rise in capillary tube will be
- a) 2 M
- b) M
- c) M/2
- d) M/4
Answer: 2 M
Question: A massless inextensible string in the form of a loop is placed on a horizontal film of soap solution of surface tension T. If film is pierced inside the loop and it convert into a circular loop of diameter d, then the tension produced in string is
- a) Td
- b)
- c)
- d)
Answer: Td
Question: The atmospheric pressure at a place is 105 Pa. If tribromomethane (specific gravity = 2.9) be employed as the barometric liquid, the barometric height is
- a) 3.52 m
- b) 1.52 m
- c) 4.52 m
- d) 2.52 m
Answer: 3.52 m
Question:
- a)
- b)
- c)
- d)
Answer:
Question: A vertical U-tube of uniform cross-section contains water in both the arms. A 10 cm glycerine column (R.D. = 1.2) is added to one of the limbs. The level difference between the two free surfaces in the two limbs will be
- a) 2 cm
- b) 6 cm
- c) 8 cm
- d) 4 cm
Answer: 2 cm
Question:
- a)
- b)
- c)
- d)
Answer:
Question: A air bubble rises from bottom of a lake to surface. If its radius increases by 200% and atmospheric pressure is equal to water coloumn of height H, then depth of lake is
- a) 26 H
- b) 9 H
- c) 8 H
- d) 21 H
Answer: 26 H
Question: A piece of gold weighs 10 g in air and 9 g in water. What is the volume of cavity? (Density of gold = 19.3 g cm–3)
- a) 0.482 cc
- b) 0.382 cc
- c) 0.282 cc
- d) 0.182 cc
Answer: 0.482 cc
Question: A block of ice floats in an oil in a vessel when the ice melts, the level of oil will
- a) Go down
- b) Go up or down depending on quantity of ice
- c) Go up
- d) Remain same
Answer: Go down
Question:
- a) 3 : 1
- b) 1 : 3
- c) 1 : 2
- d) 2 : 1
Answer: 3 : 1
Question:
- a)
- b)
- c) Q
- d) 4Q
Answer:
Question: A vessel contain a liquid has a constant acceleration 19.6 m/s2 in horizontal direction. The free surface of water get sloped with horizontal at angle
- a)
- b)
- c)
- d)
Answer:
Question: A cylinder containing water, stands on a table of height H. A small hole is punched in the side of cylinder at its base. The stream of water strikes the ground at a horizontal distance R from the table. Then the depth of water in the cylinder is
- a)
- b)
- c) R
- d) H
Answer:
More Questions........................................
Question: Two water pipes P and Q having diameter 2 × 10–2 m and 4 × 10–2 m respectively are joined in series with the main supply line of water. The velocity of water flowing in pipe P is
- a) Four times that of Q
- b) Two times that of Q
- c)
- d)
Answer: Four times that of Q
Question: Air streams horizontally past an air plane. The speed over the top surface is 60 m/s and that under the bottom surface is 45 m/s. The density of air is 1.293 kg/m3, then the difference in pressure is
- a) 1018 N/m2
- b) 516 N/m2
- c) 1140 N/m2
- d) 2250 N/m2
Answer: 1018 N/m2
Question: Two water pipes P and Q having diameter 2 × 10–2 m and 4 × 10–2 m respectively are joined in series with the main supply line of water. The velocity of water flowing in pipe P is
- a) Four times that of Q
- b) Two times that of Q
- c)
- d)
Answer: Four times that of Q
Question: At what speed, the velocity head of water is equal to pressure head of 40 cm of mercury?
- a) 10.32 m/s
- b) 2.8 m/s
- c) 5.6 m/s
- d) 8.4 m/s
Answer: 10.32 m/s
Question: If the terminal speed of a sphere of gold (density 19.5 kg/m3) is 0.2 m/s in a viscous liquid (density = 1.5 kg/m3), find the terminal speed of a sphere of silver (density = 10.5 kg/m3) of the same size in the same liquid.
- a) 0.1 m/s
- b) 0.133 m/s
- c) 0.4 m/s
- d) 0.2 m/s
Answer: 0.1 m/s
Question:
- a) The pressure difference across the ends of second capillary is 8P
- b) The pressure difference across the third capillary is 43P
- c) The pressure difference across the ends of second capillary is 16P
- d) The pressure difference across the third capillary is 59P
Answer: The pressure difference across the ends of second capillary is 8P
Question: A large open tank has two holes in its wall. One is a square of side a at a depth x from the top and the other is a circular hole of radius r at depth 4x from the top. When the tank is completely filled with water, the quantities of water flowing out per second from both holes are the same. Then r is equal to
- a)
- b)
- c)
- d) a
Answer:
Question: If T is the surface tension of a fluid, then the energy needed to break a liquid drop of radius R into 64 equal drops is
- a)
- b)
- c)
- d)
Answer:
Question: The excess pressure inside a spherical drop of water is four times that of another drop. Then their respective mass ratio is
- a) 1 : 64
- b) 1 : 4
- c) 1 : 8
- d) 1 : 16
Answer: 1 : 64
Question: The work done in blowing a soap bubble of 10 cm radius is (surface tension of soap solution is 0.03 N/m).
- a) 75.36 × 10–4 J
- b) 37.68 × 10–4 J
- c) 126.82 × 10–4 J
- d) 75.36 × 10–3 J
Answer: 75.36 × 10–4 J
Question: A glass capillary tube of inner diameter 0.28 mm is lowered vertically into water in a vessel. The pressure to be applied on the water in the capillary tube so that water level in the tube is same as that in the vessel is (surface tension of water = 0.07 N/m and atmospheric pressure = 105 N/m2).
- a) 101 × 103
- b) 100 × 103
- c) 99 × 103
- d) 103
Answer: 101 × 103
Question: Water rises to a height of 10 cm in a capillary tube and mercury falls to a depth of 3.42 cm in the same capillary tube. If the density of mercury is 13.6 kg/m3 and angle of contact is 135°, the ratio of surface tension for water and mercury is (angle of contact for water and glass is 0°).
- a) 1 : 6.5
- b) 1.5 : 1
- c) 1 : 3
- d) 1 : 0.5
Answer: 1 : 6.5
Question: A spherical drop of water has 1 mm radius. If the surface tension of water is 75 × 10–3 N/m, then difference of pressure between inside and outside of the drop is
- a) 150 N/m2
- b) 140 N/m2
- c) 70 N/m2
- d) 35 N/m2
Answer: 150 N/m2
Question: A capillary tube is dipped in water and it is 20 cm outside water. The water rises upto 8 cm. If the entire arrangement is put in freely falling elevator the length of water column in the capillary tube will be
- a) 20 cm
- b) 4 cm
- c) 10 cm
- d) 8 cm
Answer: 20 cm
Question: If the excess pressure inside a soap bubble is balanced by an oil column of height 2 mm, then the surface tension of soap solution will be (r = 1 cm, density of oil = 0.8 g/cm3)
- a) 3.9 × 10–2 N/m
- b) 3.9 × 10–1 N/m
- c) 3.9 × 10–3 N/m
- d) 3.9 N/m
Answer: 3.9 × 10–2 N/m
Question: There is small hole in a hollow sphere. The water enters in it when it is taken to a depth of 40 cm under water. The surface tension of water is 0.07 N/m. The diameter of hole is
- a) 0.07 mm
- b) 0.0007 mm
- c) 0.7 m
- d) 7 mm
Answer: 0.07 mm
Question: Two equal drops are falling through air with a steady velocity of 5 cm/second. If two drops coalesce, then new terminal velocity will be
- a) 5 × (4)1/3 cm/s
- b)
- c) 5 × 2 cm/s
- d)
Answer: 5 × (4)1/3 cm/s
Question: A small drop of water falls from rest through a large height h in air; the final velocity is
- a) Almost independent of h
- b) Proportional to h
- c) Inversely proportional to h
- d)
Answer: Almost independent of h
Question: A spring balance reads 200 gF when carrying a lump of lead in air. If the lead is now immersed with half of its volume in brine solution, what will be the new reading of the spring balance? specific gravity of lead and brine are 11.4 and 1.1 respectively
- a) 190.4 gF
- b) 180.4 gF
- c) 210 gF
- d) 170.4 gF
Answer: 190.4 gF
Question:
- a)
- b)
- c)
- d)
Answer:
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