CBSE Class 11 Physics Chapter 10 Mechanical Properties of Fluids Multiple Choice Questions with Answers. MCQ Questions Class 11 Physics Mechanical Properties of Fluids with Answers was Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 11 Physics Mechanical Properties of Fluids MCQs with Answers to know their preparation level.
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MCQ Questions Class 11 Physics Mechanical Properties of Fluids with Answers - Set - 3
Question 1:
The excess pressure inside the first soap bubble is three times that inside the second bubble then, the ratio of volume of the first to the second bubble will be :
(a) 1 : 27
(b) 3 : 1
(c) 1 : 3
(d) 1 : 9
Correct Answer – (A)
Question 2 :
A capillary tube of radius r is immersed in water and water rises in it to a height h. The mass of the water in the capillary is 5 g. Another capillary tube of radius 2r is immersed in water. The mass of water that will rise in this tube is
(a) 2.5 g
(b) 5.0 g
(c) 10.0 g
(d) 20.0 g
Correct Answer – (C)
Question 3 :
Two small spherical metal balls, having equal masses, are made from materials of densities r1 and r2(r1= 8r2) and have radii of 1mm and 2 mm, respectively. They are made to fall vertically (from rest) in a viscous medium whose coefficient of viscosity equals h and whose density is 0.1 r2. The ratio of their terminal velocities would be
(a) 79/72
(b) 19/36
(c) 39/72
(d) 79/36
Correct Answer – (D)
Question 4 :
A wind with speed 40 m/s blows parallel to the roof of a house. The area of the roof is 250 m2. Assuming that the pressure inside the house is atmospheric pressure, the force exerted by the wind on the roof and the direction of the force will be (rair = 1.2 kg/m3)
(a) 2.4 × 105 N, upwards
(b) 2.4 × 105 N, downwards
(c) 4.8 × 105 N, downwards
(d) 4.8 × 105 N, upwards
Correct Answer – (A)
Question 5 :
The cylindrical tube of a spray pump has radius R, one end of which has n fine holes, each of radius r. If the speed of the liquid in the tube is V, the speed of the ejection of the liquid through the holes is
(a) VR2 /n3r2
(b) VR2 /nr
(c) VR/n2r2
(d) VR/nr
Correct Answer – (D)
MCQ Questions Class 11 Physics Mechanical Properties of Fluids with Answers
Question 6 :
A soap bubble, having radius of 1 mm, is blown from a detergent solution having a surface tension of 2.5 × 10–2 N/m. The pressure inside the bubble equals at a point Z0 below the free surface of water in a container. Taking g = 10 m/s2, density of water = 103 kg/m3, the value of Z0 is
(a) 0.5 cm
(b) 100 cm
(c) 10 cm
(d) 1 cm
Correct Answer – (D)
Question 7 :
A small sphere of radius ‘r’ falls from rest in a viscous liquid. As a result, heat is produced due to viscous force. The rate of production of heat when the sphere attains its terminal velocity, is proportional to
(a) r3
(b) r2
(c) r5
(d) r4
Correct Answer – (C)
Question 8 :
A fluid is in streamline flow across a horizontal pipe of variable area of cross section. For this which of the following statements is correct?
(a) The velocity is maximum at the narrowest part of the pipe and pressure is maximum at the widest part of the pipe.
(b) Velocity and pressure both are maximum at the narrowest part of the pipe.
(c) Velocity and pressure both are maximum at the widest part of the pipe.
(d) The velocity is minimum at the narrowest part of the pipe and the pressure is minimum at the widest part of the pipe.
Correct Answer – (A)
Question 9 :
A small hole of area of cross-section 2 mm2 is present near the bottom of a fully filled open tank of height 2 m. Taking g = 10 m/s2, the rate of flow of water through the open hole would be nearly
(a) 6.4 × 10–6 m3/s
(b) 12.6 × 10–6 m3/s
(c) 8.9 × 10–6 m3/s
(d) 2.23 × 10–6 m3/s
Correct Answer – (B)
Question 10 :
Two non-mixing liquids of densities r and nr (n > 1) are put in a container. The height of each liquid is h. A solid cylinder of length L and density d is put in this container. The cylinder floats with its axis vertical and length pL (p < 1) in the denser liquid. The density d is equal to
(a) {2 + (n – 1)p}r
(b) {1 + (n – 1)p}r
(c) {1 + (n + 1)p}r
(d) {2 + (n + 1)p}r
Correct Answer – (B)
- NCERT Solutions Class 11 Physics Chapter 1 : Physical world
- NCERT Solutions Class 11 Physics Chapter 2 : Units And Measurements
- NCERT Solutions Class 11 Physics Chapter 3 : Motion In A Straight Line
- NCERT Solutions Class 11 Physics Chapter 4 : Motion In A Plane
- NCERT Solutions Class 11 Physics Chapter 5 : Laws of Motion
- NCERT Solutions Class 11 Physics Chapter 6 : Work Energy Power
- NCERT Solutions Class 11 Physics Chapter 7 : Rotational-Motion
- NCERT Solutions Class 11 Physics Chapter 8 : Gravitation
- NCERT Solutions Class 11 Physics Chapter 9 : Mechanical Properties of Solids
- NCERT Solutions Class 11 Physics Chapter 10 : Mechanical Properties of Fluids
- NCERT Solutions Class 11 Physics Chapter 11 : Thermal Properties of Matter
- NCERT Solutions Class 11 Physics Chapter 12 : Thermodynamics
- NCERT Solutions Class 11 Physics Chapter 13 : Kinetic Theory
- NCERT Solutions Class 11 Physics Chapter 14 : Oscillations
- NCERT Solutions Class 11 Physics Chapter 15 : Waves
