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Rotational Motion

                                


 


NEET- PHYSICS

Hey! We hope you all will be doing good. RankersHub.blogspot.com is a website for all NEET Aspirants, which will help you to practice more questions which will ultimately result in a good rank. Here I have given all chapters DPPs (with solutions) which is included in the syllabus of NEET.

Chapters covered: 

Class 11

Physics: Physical World, Units and Measurements, Motion in a Staright Line, Motion in a Plane, Laws of Motion, Work, Energy and Power, System of Particles and Rotational Motion, Gravitation, Mechanical Properties of Solids, Mechanical Properties of Fluids, Thermal Properties of Matter, Thermodynamics, Kinetic Theory, Oscillations, Waves.

Chemistry: Some Basic Concepts of Chemistry, Structure of The Atom, Classification of Elements and Periodicity in Properties, Chemical Bonding and Molecular Structure, States of Matter, Thermodynamics, Equilibrium, Redox Reactions, Hydrogen, The S-Block Elements, The P-Block Elements, Organic Chemistry - Some Basic Principles and Techniques, Hydrocarbons, Environmental Chemistry.

Biology: The Living World, Biological Classification, Plant Kingdom, Animal Kingdom, Morphology of Flowering Plants, Anatomy of Flowering Plants, Structural Organisation in Animals, Cell The Unit of Life, Biomolecules, Cell Cycle and Cell Division, Transport in Plants, Mineral Nutrition, Photosynthesis in Higher Plants, Respiration in Plants, Plant Growth and Development, Digestion and Absorption, Breathing and Exchange of Gases, Body Fluids and Circulation, Excretory Products and their Elimination, Locomotion and Movement, Neural Control and Coordination, Chemical Coordination and Integration.

Class 12

Physics: Electric Charges And Fields, Electrostatic Potential And Capacitance, Current Electricity, Moving Charges And Magnetism, Magnetism And Matter, Electromagnetic Induction, Alternating Current, Electromagnetic Waves, Ray Optics and Optical Instruments, Wave Optics, Dual Nature Of Radiation And Matter, Atoms, Nuclei, Semiconductor Electronics Materials Devices And Simple Circuits, Communication Systems.

Chemistry: The Solid State, Solutions, Electro chemistry, Chemical Kinetics, Surface Chemistry, General Principles and Processes of Isolation of Elements, The p Block Elements, The d and f Block Elements, Coordination Compounds, Haloalkanes and Haloarenes, Alcohols Phenols and Ethers, Aldehydes Ketones and Carboxylic Acids, Amines, Biomolecules, Polymers, Chemistry in Everyday Life.

Biology: Reproduction in Organisms, Sexual Reproduction in Flowering Plants, Human Reproduction, Reproductive Health, Principles of Inheritance and Variation, Molecular Basis of Inheritance, Evolution, Human Health and Disease, Strategies for Enhancement in Food Production, Microbes in Human Welfare, Biotechnology - Principles And Processes, Biotechnology and its Applications, Organisms and Populations, Ecosystem, Biodiversity and Conservation, Environmental Issues.

If u have any doubts related to this dpp, Do let us know by commenting  below.

How are these dpps useful to u?

1)These dpps can be used to prepare for various Engineering as well as Medical exams such as IT JEE Mains & Advance, MHT CET, VITEEE, KIITEE, WBJEE ,NEET, AIIMS, JIPMER, PGIMER), CBSE Board, ICSE Board, Class 12th, 11th.

2) We are providing u very important dpps which can be proven useful to Many students to crack competitive exams as well as board examinations


MCQS

1. If the radius of the earth becomes half of its present value, with
its mass remaining the same, the duration of one day will become
(a) 6 h (b) 12 h
(c) 48 h (d) 96 h

Solution- At the end



2. A man spinning in free space can change the moment of inertia
of his body (I) by changing its shape. In this process,
(a) he will have to expend some energy to increase I
(b) he will have to expend some energy to decrease I
(c) he does not have to expend any energy to change I
(d) either (a) or (b) depending on the initial value of I

Solution- At the end



3. A small ball strikes a stationary uniform rod, which is free to
rotate, in gravity-free space. The ball does not stick to the rod.
The rod will rotate about
(a) its centre of mass
(b) the centre of mass of ‘rod plus ball’
(c) the point of impact of the ball on the rod
(d) the point about which the moment of inertia of the ‘rod
plus ball’ is minimum

Solution- At the end



4. The radius of gyration of a thin disc of radius 4 cm about a
diameter is
(a) 4 cm (b) 2(underroot)2 cm
(c) 2 cm (d) (underroot)2 cm

Solution- At the end



5. A flywheel rotates with a uniform angular acceleration. Its
angular velocity increases from 20(pi) rad/s to 40(pi) rad/s in 10 seconds. How many rotations did it make in this period?
(a) 80 (b) 100
(c) 120 (d) 150

6. When a ceiling fan is switched on, it makes 10 rotations in the first 3 seconds. How many rotations will it make in the next 3 seconds? (Assume uniform angular acceleration.)
(a) 10 (b) 20
(c) 30 (d) 40

Solution- At the end



7. When a ceiling fan is switched off, its angular velocity falls to
half while it makes 36 rotations. How many more rotations will it
make before coming to rest? (Assume uniform angular
retardation.)
(a) 36 (b) 24 (c) 18 (d) 12

Solution- At the end



8. A flywheel rotating about an axis experiences an angular
retardation proportional to the angle through which it rotates. If
its rotational kinetic energy gets reduced by ΔE while it rotates
through an angle θ then
(a) ΔE ∝ θ² (b) ΔE ∝ (underroot)θ
(c) ΔE ∝ θ (d) ΔE ∝ θ ^3/2

Solution- At the end



9. An external device, e.g., an electric motor, supplies constant
power to a rotating system, e.g., a flywheel, through a torque T.
The angular velocity of the system is ω. Both T and ω are variable.
(a) ω ∝ T (b) ω ∝ 1/T
(c) ω ∝ (underroot)T (d) ω ∝ 1/(underroot)T

Solution- At the end



10.Two identical rods are joined to form an ‘X’. The smaller angle
between the rods is θ. The moment of inertia of the system about
an axis passing through the point of intersection of the rods and
perpendicular to their plane is
(a) ∝ θ (b) ∝ sin^2θ
(c) ∝ cos^∝ (d) independent of θ

Solution- At the end


SOLUTIONS
1) Ans: a
2) Ans: b
3) Ans: a
4) Ans: c
5) Ans: d
6) Ans: c
7) Ans: d
8) Ans: a
9) Ans: b
10) Ans: d

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