Work, Energy and Power - Test Series and Practice Questions with Hints, Solutions for NEET (AIIMS, JIPMER), JEE Main, JEE Advanced (IIT), NEST

Work, Energy and Power

Solved Test Series for NEET, JEE Main & Advanced, IIT, AIIMS, JIPMER, WBJEE : Work, Energy and Power

Here you get carefully prepared another Set of 10 MCQ practice questions (Q.No.11 - 20) in our each Test Series with hints & solutions (given at the end) from the Physics chapter - Work, Energy and Power.

Also study: Work, Energy and Power - Solved Test Series Set 1 (Question 1 - 10) and Test Series Set 2 (Question 21 - 30) 

Practising with our test series questions will certainly enhance your level of confidence for NEET-UG, JEE Main & Advanced (IIT) AIIMS, JIPMER, COMEDK, WBJEE, MBBS Admission Tests, Engineering Entrance Exams, NEST and other such competitive exams.

Syllabus :

Work done by a constant force and by a variable force, Unit of Work, Energy and Power, Work Energy, Theorem. Elastic and in-elastic collisions in one and two dimensions, Notions of Work and Energy, Law of Conservation of Energy, Potential and Kinetic Energies, Gravitational Potential Energy, and its conversion to Kinetic energy, Potential Energy of a spring. Conservative and Non-conservative Forces, Different forms of Energy, Three types of Equilibrium, Mass-Energy equivalence. Power.   

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Solved MCQ Test Series – Set 2 (Q. No. 11-20)

Question 11: The potential energy of a particle varies with distance ‘x’ as shown in the graph below.

The force acting on the particle is zero at -

a. C         b. B

c. B & C  d. A & D

Question 12: A box of mass 1kg is pulled on a horizontal plane of length 1m by a force of 8N then it is raised vertically to a height of 2m, the net work done is,

a. 28J    b. 8J

c. 18J    d. None of the above

Question 13: Two bodies of masses m1 and m2 have equal momenta. Their K.E. are in ratio -

a. √m₂ : √m₁   

b. m₁ : m₂

c. m₂ : m₁

d. m₁² : m₁²

Question 14: The potential energy of a long spring when stretched by 2cm is ‘U’. If the same spring is stretched by 8cm the potential energy stored in it is -  

a. 4U    b. 8U

c. 16U  d. U/4

Question 15: Work done by frictional force is always -

a. zero             b. negative

c. positive        d. may be either positive, negative or zero

Question 16: The relationship between force and position is shown in the adjacent figure. The work done by the force in displacing a body from x = 1cm to x = 5cm is,

a. 20 ergs    b. 60 ergs

c. 70 ergs    d. 700 ergs

Question 17: When momentum of a body is increased by 200%, its kinetic energy also increases by -

a. 200%      b. 400%

c. 350%      d. 800%

Question 18: Velocity - Time graph of a particle mass 2 kg moving in a straight line is as shown in figure. Work done by all the forced on the particle is -  

a. 400J

b. – 400J

c. – 200J

d. 200J.

Question 19: A spring of force const 800 N/m is extended by 5cm. The work done in extending it from 5cm to 15cm is -   

a. 16J     b. 8J

c. 32J     d. 24J

Question 20: The average power required to lift a 100kg mass through a height of 50m in approximately 50 seconds would be -

a. 50J/s    b. 5000J/s

c. 100J/s  d. 980J/s

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Physics Solutions for NEET, JEE Main, IIT, AIIMS, JIPMER

Work, Energy and Power

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Hints / Solutions of Physics MCQ Test Series – Set 2 (Q. No.11–20)

Answer 11: c. (dU/dx = 0 at B & C). Answer 12: a. Answer 13: d.

Answer 14: c. Hint:

Answer 15: d. Answer 16: a. Answer 17: d. Answer 18: b.

Answer 19: b.

 

Answer 20: d.

(Hint: Average Power = (100 x 9.8 x 50) ÷ 50 = 980 J/s)

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Work, Energy and Power - Solved Test Series, Questions Bank with Hints, Solutions for NEET (AIIMS, JIPMER), JEE Main, JEE Advanced (IIT), NEST

Physics Solutions for NEET, JEE Main, IIT, AIIMS, JIPMER, WBJEE : Work, Energy and Power

Here you will get carefully selected 10 MCQ practice questions in our each Test Series with hints & solutions (given at the end) from the Physics chapter - Work, Energy and Power.

All these are typically important questions for NEET-UG, JEE Main & Advanced (IIT) AIIMS, JIPMER, COMEDK, WBJEE, MBBS Admission Tests, Engineering Entrance Exams, NEST and other such competitive exams.

Topics / Syllabus for IIT JEE Main & Advanced, NEET (AIPMT, JIPMER):

Work done by a constant force and by a variable force, Unit of Work, Energy and Power, Work Energy, Theorem. Elastic and in-elastic collisions in one and two dimensions, Notions of Work and Energy, Law of Conservations of Energy, Potential and Kinetic Energies, Gravitational Potential Energy, and its conversion to Kinetic energy, Potential Energy of a spring. Conservative and Non-conservative Forces, Different forms of Energy, Three types of Equilibrium, Mass - Energy equivalence. Power.   

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Solved MCQ Test Series – Set 1 (Q. No. 1-10)

Question 1: The figures below represent the total potential energy ‘U’ of a function of the inter-atomic distance ‘r’. Which diagram corresponds to stable molecules found in nature -  

Question 2: A 50kg man with 20kg load on his headclimbs up 20 steps of 0.25m height each. The work done by the man on the block during climbing is -  

a. 5J        b. 350J

c. 1000J  d. 3540J

Question 3: In the case of conservative force -

a. work done is independent of path

b. work done in a close loop is zero

c. work done against conservative force is stored in the form of potential energy

d. all the above.

Question 4: A man is sitting on a swing at a maximum height of 5m above the ground. When the swing passes through the mean position which is 2m above the ground its velocity will be approximately -

a. 7.6 m/s     b. 9.8 m/s

c. 6.26 m/s   d. 98 m/s.

Question 5: A body loses half of its velocity on penetrating 6cm in a wooden block. How much will it penetrate more before coming to rest?  

a. 1cm     b. 2cm

c. 3cm     d. 4cm

Question 6: The work done by all the forces (external & internal) on a system equals to the change in -  

a. only kinetic energy

b. only potential energy

c. total energy

d. none of these

Question 7: For the path PQR in a conservative force field as shown in figure, the amount of work done in carrying a body from P to Q and from Q to R are 5J and 2J respectively. The work done in carrying the body from P to R will be equal to -

a. 7J        b. 3J

c. √21J    d. zero

Question 8: A block of mass ‘m’ is lowered with the help of a rope of negligible mass through a distance ‘d’ with an acceleration of g/3. Work done by the on the block is,

Question 9: A particle of mass ‘m’ at rest is acted upon by a force ‘F’ for time ‘t’. The kinetic energy of the particle after an interval ‘t’ is -    

a. F²t²/m        b. (Ft)²/2m

c. (Ft)²/3m     d. Ft/2m

Question 10: A man tries to push a wall and fails to displace it. He does -

a. negative work    b. positive work

c. no work              d. none of these

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Physics Practice Questions for NEET, JEE Main, IIT, AIIMS, JIPMER: 

Work, Energy and Power

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Hints & Solutions of MCQ Test Series – Set 1 (Q. No.1–10)

Answer 1: a. (Hint: Among four diagrams in this diagram, ‘U’ is minimum for some value of ‘r’). Answer 2: c. (W = 20 x 10 x 20 x 0.25 = 1000J) Answer 3: d. Answer 4: a. Answer 5: b. Answer 6: a. Answer 7: a.

Answer 8: b. Answer 9: b.

Answer 10: c.

 Work, Energy and Power  - More Practice Questions, Test Series 

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Solved Chemistry MCQ Test Series on Chemical Bonding and Molecular Structure for NEET, IIT, JEE main

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On this page you have chemistry practice questions answers (MCQ test series) for NEET, JEE main, NEST, other admission tests, Engineering and Medical Entrance Exams.

Chemical Bonding and Molecular Structure

Syllabus :

Chemical combination; Kossel-Lewis Approach to Chemical Bonding; Lattice Energy; Covalent Bond; Octet Rule; Ionic and electrovalent Bond; Electrovalency; Covalency; Writing formula of an ionic compound; Coordinate Bond; Metallic Bond; Bond parameters - bond length, bond angle, bond enthalpy, bond order, resonance structures, polarity of bonds; The Valence Shell Electron Pair Repulsion (VSEPR) Theory; Valence Bond Theory; Geometry of molecules; Hybridisation; Molecular Orbital Theory; Bonding in some Homonuclear Diatomic Molecules; Hydrogen Bonding

Chemistry Solution: Chemical Bonding and Molecular Structure

MCQ Test Series – Set 4 (Q No.31-40)

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Question 31: Among the following compounds the one that is polar and has the central atom with sp² hybridisation is:

a. H₂CO₃

b. SiF₄

c. BF₃

d. HClO₂

Question 32: The bond order –

a. Can have negative value

b. Is any number other than zero

c. Is any integer

d. Can have any value including zero

Question 33: Which of the following molecular species has unpaired electron(s)?

a. N₂

b. F₂

c. O₂^-

d. O₂^2-

Question 34: Which compound has planar structure?

a. XeF₄

b. XeOF_2­

c. XeO₂F₂

d. XeO₄

Question 35: Molecular orbital theory is preferred over valence bond theory as it can explain:

a. Bond strength

b. Geometry of molecule

c. The magnetic nature of the molecule

d. None of the above

Question 36: Acetylene consists of –

a. Both sigma and pi bonds

b. Sigma bond only

c. Pi bond only

d. None of these

Question 37: Which among the following has the highest volatility?

a. H₂O

b. H₂S

c. H₂Se

d. H₂Te

Question 38: Which one of the following is not the resonating structure of CO₂:

a. O ≡ C = O

b. O = C = O

c. ^–O – C ≡ O⁺

d. ⁺O ≡ C – O^-

Question 39: Born Haber cycle is based on:

a. Law of conservation of mass

b. Law of conservation of energy

c. Fajan’s law

d. Charle’s law

Question 40: Which of the following models best describes the bonding within a layer of the graphite structure?

a. Metallic bonding

b. Ionic bonding

c. Non-metallic covalent bonding

d. Van der Waals forces

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MCQ Test Series: Chemical Bonding and Molecular Structure

Solutions of Set 4 (Q. No.31 – 40)

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Answer 32: (d). Answer 33: (c). Answer 34: (a). Answer 35: (c). Answer 36: (a). Answer 37: (b). Answer 38: (a). Answer 39: (b). Answer 40: (c).

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