9394949438

[LATEST]$type=sticky$show=home$rm=0$va=0$count=4$va=0


FLUID MECHANICS QUIZ-19

Dear Readers,

As per analysis for previous years, it has been observed that students preparing for NEET find Physics out of all the sections to be complex to handle and the majority of them are not able to comprehend the reason behind it. This problem arises especially because these aspirants appearing for the examination are more inclined to have a keen interest in Biology due to their medical background. Furthermore, sections such as Physics are dominantly based on theories, laws, numerical in comparison to a section of Biology which is more of fact-based, life sciences, and includes substantial explanations. By using the table given below, you easily and directly access to the topics and respective links of MCQs. Moreover, to make learning smooth and efficient, all the questions come with their supportive solutions to make utilization of time even more productive. Students will be covered for all their studies as the topics are available from basics to even the most advanced. .

Q1. A ball whose density is 0.4×103 kg m(-3) falls into water from a height of 9 cm. To what depth does the ball sink?
  •  9cm
  •  6cm
  •  4.5cm
  •  2.25cm
Solution
The velocity of ball before entering the water surface v=√2gh=√(2g×9) When a ball enters into water, due to upthrust of water the velocity of ball decreases (or retarded) The retardation, a=(apparent weight)/(mass of ball) a=V(ρ-σ)g/Vρ=(ρ-σ)g/ρ ((0.4-1)/0.4)g=-3/2 g If h be the depth upto which ball sink, then 0-v2=2×((-3)/2 g)×h ⟹ 2g×9=3gh ∴ h=6 cm

Q2.Choose the correct statement(s) for a cricket ball that is spinning clockwise through air S1 : Streamlines of air are symmetric around the ball S2 : The velocity of air above the ball relative to it is larger than that below the ball S3 : The velocity of air above the ball relative to it is smaller than that below the ball S4 : There is a net upward force on the ball
  •  S1, S2 and S4
  •  S2 and S4
  •  S4 only
  •  S3 only
Solution
The streamlines of air for a ball which is moving and spinning at the same time is as shown in figure below. The ball is moving forward and relative to it the air is moving backwards. Therefore, the velocity of air above the ball relative to it is larger and below it is smaller. The streamlines thus get crowded above and rarified below. This difference in the velocities of air results in the pressure difference between the lower and upper faces and there is a net upward force on the ball. This dynamic lift due to spinning is known as magnus effect

Q3.  Horizontal tube of non-uniform cross-section has radii of 0.1 m and 0.05 m respectively at M and N. For a streamline flow of liquid the rate of liquid flow is
  •   Changing continuously with time
  •  Greater at M than N
  •  Greater at N than at M
  •  Same at M and N
Solution
The velocity of flow will increases if cross-section decreases and vice-versa
 ie, A1 v1=A2 v2 
 or Av=constant 
 Therefore, the rate of liquid flow will be greater at N than at M.

Q4. A piece of solid weighs 120 g in air, 80 g in water and 60 g in a liquid. The relative density of the solid and that of the liquid are respectively
  •  3,2
  •  2,3/4
  •  3/2,2
  •  4,3
Solution
Relative density of solid =(weight in air)/(weight in air-weight in water) ⟹ Relative density of solid =120/(120-80)=120/40=3 Relative density of liquid =(weight in air-weight in liquid )/(weight in air-weight in water) ⟹ Relative density of liquid =(120-60)/(120-80)=60/40=3/2

Q5.An aeroplane gets its upward lift due to phenomenon described by the
  •  Archimedes’ principle
  •  Bernoulli’s principle
  •  Buoyancy principle
  •  Pascal law
Solution
 Bernoulli’s principle

Q6. When a large bubble rises from the bottom of a lake to the surface. Its radius doubles. If atmospheric pressure is equal to that of column of water height H, then the depth of lake is
  •  H
  •  2H
  • 7H
  •  8H
Solution
P1 V1=P2 V2⇒(P0+hρg)×4/3 πr3=P0×4/3 π(2r)3 Where, h= depth of lake ⇒hρg=7P0⇒h=7×Hρg/ρg=7H

Q7. The velocity of a small ball of mass M and density d_1 when dropped in a container filled with glycerine becomes constant after some time. If the density of glycerine is d_2, the viscous force acting on the ball is
  •  Mg(1 d2/d1 )
  •  Mg d1/d2
  •  Mg(d1-d2)
  •  Mgd1 d2
Solution
Viscous force upwards = Apparent weight in liquid ∴ Viscous force=Mg-(Mgd2)/d1 Viscous force=Mg(1-d2/d1 )

Q8.In the following fig. is shown the flow of liquid through a horizontal pipe. Three tubes A,B and C are connected to the pipe. The radii of the tubes A,B and C at the junction are respectively 2 cm,1 cm and 2 cm. It can be said that the
  •  Height of the liquid in the tube A is maximum
  •  THeight of the liquid in the tubes A and B is the same
  •  Height of the liquid in all the three tubes is the same
  •  Height of the liquid in the tubes A and C is the same
Solution
As cross-section areas of both the tubes A and C are same and tube is horizontal. Hence according to equation of continuity vA=vC and therefore according to Bernoulli’s theorem PA=PCi.e.height of liquid is same in both the tubes A and C

Q9.A drop of oil is placed on the surface of water then it will spread as a thin layer because
  •  surface tension tends to give the oil a spherical surface
  •  surface tension of water is greater than that of oil
  •  both oil and water have nearly equal surface tension
  •  oil is lighter than water
Solution
An oil drop spreads as thin layer, on the surface of water because the cohesive force between water molecules is greater than the adhesive force between water-oil molecules, hence the surface tension of water is greater than that oil.

Q10. The excess pressure in a bubble of radius R of a gas in a liquid of surface tension S is
  •  2S/R
  •  2R/S
  •  2S/R2
  • 2R2/S
Solution
Excess pressure inside a bubble of radius R=2S/R where S is the surface tension of the liquid.

Want to know more

Please fill in the details below:

INNER POST ADS

Latest IITJEE Articles$type=three$c=3$author=hide$comment=hide$rm=hide$date=hide$snippet=hide

Latest NEET Articles$type=three$c=3$author=hide$comment=hide$rm=hide$date=hide$snippet=hide

Name

Admissions,1,Alternating Current,60,AP EAMCET 2020,1,Basic Maths,2,BCECE 2020,1,best books for iit jee,2,best coaching institute for iit,1,best coaching institute for iit jee preparation,1,best iit jee coaching delhi,1,best iit jee coaching in delhi,2,best study material for iit jee,4,BITSAT Registration 2020,1,Blog,62,books for jee preparation,1,books recommended by iit toppers,3,Capacitance,3,CBSE,1,CBSE accounts exam,1,CBSE boards,1,CBSE NEET,9,cbse neet 2019,3,CBSE NEET 2020,1,cbse neet nic,1,Centre of Mass,2,Chemistry,58,Class 12 Physics,15,coaching for jee advanced,1,coaching institute for iit jee,2,Collision,2,COMEDK UGET 2020 Application Form,1,COMEDK UGET 2020 Exam Form,1,COMEDK UGET news,1,CUCET 2020,2,Current Electricity,4,CVR college,1,Electromagnetic Induction,3,Electronics,1,Electrostatics,3,Energy,1,Engineering & Medical,1,Fluid Mechanics,4,Gravitation,2,GUJCET 2020 Application Form,1,Heat,4,iit admission,1,iit advanced,1,iit coaching centre,3,iit coaching centre in delhi,2,iit coaching classes,2,iit coaching in delhi,1,iit coaching institute in delhi,1,iit entrance exam,1,iit entrance exam syllabus,2,iit exam pattern,2,iit jee,5,iit jee 2019,3,iit jee advanced,2,iit jee books,3,iit jee coaching,2,iit jee exam,3,iit jee exam 2019,1,iit jee exam pattern,3,iit jee institute,1,iit jee main 2019,2,iit jee mains,3,iit jee mains syllabus,2,iit jee material,1,iit jee online test,3,iit jee practice test,3,iit jee preparation,6,iit jee preparation in delhi,2,iit jee preparation time,1,iit jee preparation tips by toppers,2,iit jee question paper,1,iit jee study material,3,iit jee study materials,2,iit jee syllabus,2,iit jee syllabus 2019,2,iit jee test,3,iit preparation,2,iit preparation books,5,iit preparation time table,2,iit preparation tips,2,iit syllabus,2,iit test series,3,IITJEE,100,IPU CET,1,JEE Advanced,83,jee advanced exam,2,jee advanced exam pattern,1,jee advanced paper,1,JEE Books,1,JEE Coaching Delhi,3,jee exam,3,jee exam 2019,6,JEE Exam Pattern,2,jee exam pattern 2019,1,jee exam preparation,1,JEE Main,85,jee main 2019,4,JEE Main 2020,1,JEE Main 2020 Application Form,2,JEE Main 2020 news,2,JEE Main 2020 Official Answer Key,1,JEE Main 2020 Registration,1,JEE Main 2020 Score,1,JEE Main application form,1,jee main coaching,1,JEE Main eligibility criteria,3,jee main exam,1,jee main exam 2019,3,jee main online question paper,1,jee main online test,3,JEE Main Paper-2 Result,1,jee main registration,2,jee main syllabus,2,JEE mains 2020,1,jee mains question bank,1,jee mains test papers,3,JEE Mock Test,2,jee notes,1,jee past papers,1,JEE Preparation,2,jee preparation in delhi,1,jee preparation material,4,JEE Study Material,1,jee syllabus,6,JEE Syllabus Chemistry,1,JEE Syllabus Maths,1,JEE Syllabus Physics,1,jee test series,3,KCET - 2020,1,Kinematics,1,Latest article,5,Latest Articles,61,Latest News,34,latest news about neet exam,1,Laws of Motion,2,Magnetic Effect of Current,3,Magnetism,3,MHT CET 2020,2,MHT CET 2020 exam schedule,1,Modern Physics,1,NCERT Solutions,15,neet,3,neet 2019,1,neet 2019 eligibility criteria,1,neet 2019 exam date,2,neet 2019 test series,2,NEET 2020,2,NEET 2020 Application Form,1,NEET 2020 Eligibility Criteria,1,NEET 2020 Registration,1,neet application form,1,neet application form 2019 last date,1,Neet Biology Syllabus,1,Neet Books,3,neet eligibility criteria,3,neet exam 2019,7,neet exam application,1,neet exam date,1,neet exam details,1,neet exam pattern,6,neet exam pattern 2019,2,neet examination,1,neet mock test 2019,1,Neet Notes,3,Neet Online Application Form,3,neet online test,2,neet past papers,1,neet physics syllabus,1,neet practice test,2,NEET preparation books,1,neet qualification marks,1,NEET question paper 2019,1,neet question papers,1,neet registration,1,Neet Study Material,3,neet syllabus,6,neet syllabus 2019,5,NEET Syllabus 2020,1,neet syllabus chemistry,1,neet syllabus for biology,1,neet syllabus for physics,1,neet test series,1,neet ug 2019,2,news,5,online study material for iit jee,1,Optical Instruments,1,Physics,110,physics books for iit jee,1,Power,1,Practical Physics,1,Quiz,5,Ray Optics,1,Rotational Motion,3,SHM,3,Simple Harmonic Motion,3,study materials for iit jee,1,Study Notes,110,study notes for iit jee,1,Thermodynamics,4,TS EAMCET Notification,2,Units and Dimensions,1,UPSEE 2020,1,UPSEE 2020 Application Form,2,UPSEE EXAM,1,Vectors,2,VITEE Application form,1,Wave Motion,3,Wave Optics,1,WBJEE 2020 Admit Card,1,WBJEE 2020 Answer Key,1,Work,1,
ltr
item
BEST NEET COACHING CENTER | BEST IIT JEE COACHING INSTITUTE | BEST NEET, IIT JEE COACHING INSTITUTE: FLUID MECHANICS QUIZ-19
FLUID MECHANICS QUIZ-19
https://lh3.googleusercontent.com/-6RseTykpyzY/X8SVK-eahXI/AAAAAAAAFb4/1afzq8A-f_QNmxFl7or9K39qyUlFiZCZwCLcBGAsYHQ/w571-h300/Quiz%2BImage%2BTemplate%2B%252818%2529.jpg
https://lh3.googleusercontent.com/-6RseTykpyzY/X8SVK-eahXI/AAAAAAAAFb4/1afzq8A-f_QNmxFl7or9K39qyUlFiZCZwCLcBGAsYHQ/s72-w571-c-h300/Quiz%2BImage%2BTemplate%2B%252818%2529.jpg
BEST NEET COACHING CENTER | BEST IIT JEE COACHING INSTITUTE | BEST NEET, IIT JEE COACHING INSTITUTE
https://www.cleariitmedical.com/2020/11/FLUIDMECHANICSQUIZ-19.html
https://www.cleariitmedical.com/
https://www.cleariitmedical.com/
https://www.cleariitmedical.com/2020/11/FLUIDMECHANICSQUIZ-19.html
true
7783647550433378923
UTF-8
Loaded All Posts Not found any posts VIEW ALL Readmore Reply Cancel reply Delete By Home PAGES POSTS View All RECOMMENDED FOR YOU LABEL ARCHIVE SEARCH ALL POSTS Not found any post match with your request Back Home Sunday Monday Tuesday Wednesday Thursday Friday Saturday Sun Mon Tue Wed Thu Fri Sat January February March April May June July August September October November December Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec just now 1 minute ago $$1$$ minutes ago 1 hour ago $$1$$ hours ago Yesterday $$1$$ days ago $$1$$ weeks ago more than 5 weeks ago Followers Follow THIS CONTENT IS PREMIUM Please share to unlock Copy All Code Select All Code All codes were copied to your clipboard Can not copy the codes / texts, please press [CTRL]+[C] (or CMD+C with Mac) to copy