UNIT-1
LONG ANSWER QUESTIONS
1. State law of conservation of energy and verify it in the case of
a. Freely falling body
b. Vertically projected body
Under what conditions law of conservation of energy is applicable?
2. State and prove work-energy theorem under what conditions this theorem is applicable?
3. Define KE and derive expressions for it. Obtain the relation between KE and momentum. Can the momentum of a body changes without changing its KE?
4. Define angle of friction and angle of repose. Derive the expression for acceleration of a body, time taken and velocity on a 1. Rough inclined plane 2. Smooth inclined plane.
SHORT ANSWER QUESTIONS
1. What is error? Explain different types of errors in measurement.
2. What are significant figures? Write the rules for measuring significant figures.
3. What is rounding of a number? What are rules for rounding of numbers?
4. What are the uses of dimensional method? What are its limitations?
5. State and prove parallelogram law of addition of vectors.
6. Define scalar product. Write its properties.
7. Define vector product. Write its properties.
8. Show that time of ascent is equal to time of descent in the case of vertically projected body.
9. Show that the path of an object thrown at certain angle with horizontal is parabola.
10. Derive the expressions for maximum height, time of flight and range of oblique projectile.
11. Show that the path of an object thrown horizontally from certain height is parabola.
12. State the Newton’s laws of motion. How they are equivalent?
13. Derive F=ma.
14. Two unequal masses are connected by light string passed over a smooth pulley. Find acceleration of the system and the tension in the string? (Atwood’s machine)
15. Derive the expressions for apparent weight of a person in lift in different cases.
16. State and prove law of conservation of momentum. Give two examples.
17. Derive the expression for PE.
18. Obtain the expressions for final velocities of two bodies undergo one dimensional head on collision.
19. Show that relative velocity of approach before collision is equal to relative velocity of separation after collision.
20. Show that two bodies of equal masses exchange their velocities after one dimensional elastic collision.
21. Derive the expression for height attained by freely falling body after n rebounds.
22. Find the total distance travelled by freely falling body after successive rebounds before coming to rest?
23. Write the properties of center of mass.
24. Write the differences between center of mass and center of gravity.
25. Derive the expressions for velocity, acceleration and momentum of center of mass.
26. Show that if no external forces acting on the system the acceleration is zero and velocity is constant.
27. Define friction and coefficient of friction. Write the laws of friction.
28. What are advantages and disadvantages of friction?
29. What are the reducing methods of friction?
30. Why it is easy to pull than push of a lawn roller? Explain?
VERY SHORT ANSWER QUESTIONS
1. Define accuracy and precision?
2. What is absolute error?
3. What is mean absolute error and relative error?
4. What are fundamental and derived quantities?
5. Define dimension and dimensional formula.
6. Which physical quantity has negative dimensions?
7. Show that angular momentum and Planck’s constant has same dimensions.
8. State two constants have dimensions.
9. What physical quantity represented
, PV?
10. The density of wood is 0.8 gm/cc. Find its value in SI?
11. Surface tension of water is 70 dyne/cm. Find its value in SI?
12. The air pressure is 10N/m2. Find its value in C.G.S system?
13. If the units of mass, length and time are doubled, what happens to unit of energy?
14. The units of length and force are increased by 4 times, how the unit of pressure is changed?
15. If F, L, and T are the fundamental quantities of force, length and time, what is the dimension of mass?
16. If E, V is the fundamental quantities of energy and volume, what is the dimension of pressure?
17. Error in the measurement of radius of sphere is 1%, what is the error in measurement of volume?
18. The percentage of errors in the mass and speed are 2% and 3%, what is the maximum error in the measurement of KE?
19. Define vector. Give two examples.
20. Define scalar. Give two examples.
21. State triangle law and polygon law of addition of vectors.
22. Define unit vector. What is its direction?
23. Define null vector and position vector.
24. If |a+b|=|a-b|, what is the angle between a and b?
25. If |axb|=|a.b|, what is the angle between a and b?
26. A=i-j, what is the angle between vector with x-axis?
27. Can a vector of zero magnitude have non zero components?
28. Can two vectors of unequal magnitude add up to zero vector?
29. Can three vectors of unequal magnitude add up to zero vector?
30. Is speed of the particle is negative? Justify your answer.
31. How average velocity is differing from instantaneous velocity?
32. Can a body have constant velocity when the speed is changing?
33. Can a body have constant speed when the velocity is changing?
34. Can a body have zero velocity and non zero acceleration? Give examples.
35. Can a body have velocity and accelerations in opposite direction?
36. What is the value of velocity and acceleration of projectile at maximum height?
37. Give an example where the speed of the body is constant while velocity is not?
38. Can a body accelerate if the speed is constant?
39. Can a body accelerate if the velocity is constant?
40. What are complementary angles?
41. According to Newton’s third law action and reaction are equal and opposite. How the body moves?
42. What is the inertia? What it measures?
43. When a bullet fired from gun, the gun moves in backward direction and bullet moves in forward direction. Why?
44. A bomb at rest explodes into two pieces moves in opposite direction. Why?
45. A nucleus at rest disintegrates into small nuclei the product should move in opposite directions. Why?
46. Why the heavy rifles not recoil by using same cartridges?
47. What is impulse? Write its units and DF.
48. Write two applications of impulse.
49. Why shock absorbers are fitted to vehicles?
50. Why cricketer pulls his hands backward while taking catch?
51. Define work, power and energy. Write units and dimensional formulas.
52. Define force and momentum. Write units and dimensional formulas.
53. What are the conditions for no work in done?
54. Which physical quantities represent the area of F-S graph, F-T graph?
55. A meter scale of mass m lying horizontal on the floor of a room. What is the workdone to make it vertical?
56. When horse pulls a cart, which force helps the horse to move the forward?
57. Why the loaded truck starts more slowly than empty truck?
58. The particles of mud fly off tangentially from the wheel of moving vehicle. Why?
59. While jumping out from the moving bus the person runs along the direction of the bus. Why?
60. While dusting the carpet we give sudden jerk or beat with stick. Why?
61. What is the net force on a piece of wood floating on water?
62. A body of mass m lifted through height h. what is the workdone by gravitational force?
63. Two bodies of different masses have same momentum, which will have more KE?
64. A lorry and car moving with same KE are brought to rest by the application of same retarding force. Which will come to rest in shorter time?
65. A lorry and car moving with same KE are brought to rest by the application of same retarding force. Which will come to rest in less distance?
66. If KE of the body is equal to momentum, what is its velocity?
67. What is the cause of collision?
68. Define collision. What are the types of collision? Which quantity is conserved in any collision?
69. What are elastic and inelastic collisions?
70. Define coefficient of restitution? What are its values?
71. What are the values of coefficient of restitutions for elastic and inelastic collisions?
72. What is the nature of forces involved in elastic and inelastic collisions?
73. In which type of collision mechanical energy is transformed into other forms of energy?
74. A small sphere dropped from a height 10 cm on floor rebounds to a height 15 cm. Explain your answer.
75. A small sphere dropped from a height 10 cm on floor rebounds to a height 10 cm. Explain your answer.
76. A body freely falling from a height with velocity 100 m/sec, with what velocity it rebounds?(e=0.6)
77. A body falls from a height h after striking the ground it rebounds h/4. What is the value of e?
78. Define center of mass and on what factors it depends?
79. Does center of mass and center of gravity are coinciding? When?
80. Is it necessary the center of mass lie within the body?
81. Is it necessary the mass should be present at the center of the mass of the body?
82. In the absence of external forces what is the velocity and acceleration of CM?
83. When the bomb exploded in air, what is the motion of CM?
84. What is the path of motion of CM of earth moon system?
85. How the CM is affected with external and internal forces?
86. A uniform wire is bent in the form of rectangle of length L and width W. The two sides coincide with x and y axes, what is the co-ordinates of CM?
87. How the time period of oscillation of swing changes by sitting and standing of girl while swinging?
88. Can you change the CM of your body by pulling your hair up?
89. A boy stands at one end of stationary boat relative to shore. He walks towards opposite end of the boat away from the shore, in what direction the boat moves?
90. State Pappu’s theorems.
91. Define friction. On what factors it depends?
92. Define coefficient of friction. Write their units.
93. Can the coefficient of friction greater than one?
94. Can the coefficient be zero?
95. What happens to the frictional force when the body is moderately polished and heavily polished?
96. What happens to coefficient of friction if the weight of the body is doubled?
97. A horse has to pull harder during start of motion than later. Why?
98. Why the wheels of vehicles fitted with ball bearings?
99. Why aero planes and auto mobiles are streamlined?
100.Why does the car with flattened tires stop sooner than one with inflated tires?
101.What is the normal reaction of a body when it is rest on 1) Horizontal surface 2) Inclined plane?
102.What force is required to move the body up on a rough inclined plane with uniform velocity?
103.Is the friction the reaction of applied force? Does the friction is occur action and reaction pair?
104.What is the effect of temperature on coefficient of friction?
105.What is the effect of lubrication on coefficient of friction?
106. How do you make a body slide down a smooth inclined plane with constant velocity?
107.How do you move the body up the smooth plane without acceleration?
108.How do you move a solid cylinder such that its slides up a rough inclined plane?
PROBLEMS (NEW TEXT BOOK)
UNITS AND DIMENSIONS AND ERRORS:
EX-3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17, 18
EXERCISE-1, 2, 3, 4, 5, 6, 11, 12, 13, 14, 16, 17, 19, 21, 22
VECTORS:
EX-4, 5, 6, 10, 12, 13
EXERCISE-14, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31
KINEMATICS:
EX-1, 5, 9
EXERCISE-7, 22, 25, 27
DYNAMICS:
EX-1, 2, 3, 4, 5, 10, 11, 12, 13, 14, 15, 16, 17, 30, 32, 33
EXERCISE-1, 2, 3, 33, 34, 37, 36, 35, 41, 42, 43, 44, 45, 46
COLLISIONS:
EX-2, 5, 6, 7, 8
EXERCISE-1, 2, 3, 4, 5, 6, 7, 10
CENTER OF MASS:
EX-2, 3
EXERCISE-1, 5, 6, 7, 9, 10, 11
FRICTION:
EX-1, 2, 3, 4, 9, 11, 12, 13
EXERCISE-6, 7, 10, 11, 18, 20
WEIGHTAGE: 1 X 8 = 8M
3X 4 = 12M
3 X 2 = 6M
TOTAL = 26 MARKS
UNIT-2
LONG ANSWER QUESTIONS
1. State and prove parallel axis theorem and perpendicular axis theorem (and applications).
2. Derive the expressions for variation of ‘g’ with 1. Altitude 2. Depth 3. Rotation of earth.
3. Define SHM. Show that the motion the simple pendulum is in SHM and derive the expression for time period.
4. What is reference circle? What is its importance? Derive the expressions for displacement, velocity, acceleration and time period.
5. Derive the expressions for KE and PE of a particle in SHM and show that the energy is conserved in SHM.
6. Define Hook’s law. Describe Searle’s method to determine young’s modulus of given wire.
7. Describe an experiment to determine surface tension of liquid by capillary rise method with necessary theory.
8. State and prove Bernoulli theorem. On what conditions this theorem is applicable? Write its applications.
SHORT ANSWER QUESTIONS
1. State and prove law of conservation of angular momentum. Write two applications.
2. Derive the expressions for critical velocities at lowest and highest points in vertical circular motion.
3. Explain Newton’s law of gravitation. Derive the relation between g and G.
4. Explain the formation of black holes.
5. Derive the expressions for orbital velocity. On what factors it depends?
6. Derive the expression for escape velocity. On what factors it depends?
7. Show that the projection of particle in uniform circular motion is in SHM.
8. Derive the expression for time period of loaded spring.
9. Explain the behavior of wire under gradually increasing load.
10. Define stress. Explain different types of stress.
11. Define strain. Explain different types of strain.
12. Define Y, n, K. write its units.
13. Derive the expression for strain energy.
14. Define surface tension. Explain it based on molecular theory.
15. What is capillarity? Write its examples in daily life.
16. Derive the expression for excess pressure 1. Liquid drop 2. Soap bubble.
17. What is buoyancy? Derive the expression for it.
18. Derive the expression for equation of continuity.
19. Derive the expression for terminal velocity of a body moving in viscous medium.
20. What is dynamic lift? Explain dynamic lift in the case of air foil and spinning of ball.
VERY SHORT ANSWER QUESTIONS
1. What is the axis of rotation?
2. Define moment of inertia. Write units and DF. On what factors it depends?
3. Define radius of gyration. Write units and DF. On what factors it depends?
4. Define torque and couple. Write their units.
5. Is torque is scalar or vector? What is its direction?
6. Is angular momentum is scalar or vector? What is its direction?
7. Give the vector form of the relation between 1) v and w 2) a and α 3) τ and F 4) L and P.
8. Two rigid bodies have same angular momentum, which body will have greater KE?
9. Two rigid bodies have same moment of inertia, which body will have greater KE?
10. When a body is moving in a vertical circle, what are the velocities and tensions at lowest, highest and middle points?
11. Derive τ=Iα?
12. Derive L=IW?
13. Derive τ=dL/dt?
14. What is the magnitude of ω.v and ω.r?
15. Which physical quantities are constant in uniform circular motion?
16. Which physical quantities are variable in uniform circular motion?
17. A body is moving in circular path of variable velocity, what is its resultant acceleration?
18. What is the condition of equilibrium of rotating of body under the action of coplanar forces?
19. Is it possible to open the door by applying large force at the hinges?
20. A steel sphere and wooden sphere have same mass, which will have greater moment of inertia?
21. A steel sphere and wooden sphere of same radius, which will have small moment of inertia?
22. What happens to duration of the day when polar ice caps melts?
23. What is the direction of angular momentum of a body moving in xy plane?
24. A person standing on a rotating table by stretching his hands if he folds the hands, how the moment of inertia and angular momentum will change?
25. A person standing on a rotating table. If the person sits, how the moment of inertia and angular momentum will change?
26. Define angular velocity, angular acceleration and angular displacement. Write their units. State whether they are scalars or vectors.
27. What is the total KE of rolling body?
28. What are basic forces in the nature and arranging them in ascending order?
29. Write the units and DF of g and G. how they are related?
30. Write any two properties of gravitational forces.
31. Keeping the mass of the earth constant the radius of the earth is decreased by 2%. How g changes?
32. Keeping the density of the earth constant the radius of the earth is decreased by 2%. How g changes?
33. How the mass and weight of the body changes when we go from one planet to another planet?
34. Is the time period of simple pendulum of same length is same on all planets?
35. What is the value of g at center of the earth?
36. For small and equal values of d and h, which is greater gh or gd?
37. For large and equal values of d and h, which is greater gh or gd?
38. How the values of g change at equator and poles by rotation of earth?
39. What factors make g least at equator?
40. What factors make g maximum at equator?
41. Write the limitations of Newton’s third law.
42. What is white dwarf? What is its maximum mass?
43. What is the Chandrasekhar limit?
44. What is the neutron star? What are the limits for its mass?
45. What inertial and non-inertial frames?
46. Define principle of equivalence. Is it applicable for electromagnetic phenomenon?
47. Write differences between inertial mass and gravitational mass.
48. What is geostationary satellite? What is its time period? What is its height from the surface of the earth?
49. Why there is no atmosphere on the moon?
50. Hydrogen is in abundance around the sun and less around the earth. Why?
51. What is the relation between orbital velocity and escape velocity?
52. What causes the tides in ocean?
53. What is the acceleration and velocity of a body at the center of the earth?
54. Can the sun become a black hole?
55. What stops the collapse of white dwarf and neutron star?
56. What is apparent weight of a body in a satellite revolving around the earth?
57. How many numbers of satellites are required to cover entire surface of the earth?
58. When a body is projected from the surface of a planet with a velocity less than the orbital velocity what path does it follow when it returns to the earth?
59. When a body is projected with a velocity equal to the orbital velocity how does it moves?
60. When a body is projected with a velocity greater than the orbital velocity how does it move?
61. When a body is projected with a velocity equal to the escape velocity what path does it follow?
62. When a body is projected with a velocity greater than the escape velocity how does it move?
63. Why doesn’t the moon hit the earth because of earth’s gravity?
64. What is periodic motion and oscillatory motion?
65. All the periodic motions are oscillatory. Give example.
66. Write the conditions for SHM?
67. Give examples of SHM.
68. Which physical quantities are maximum values at mean position in SHM?
69. Which physical quantities are maximum values at extreme position in SHM?
70. What is the phase difference between displacement and velocity in SHM?
71. What is the phase difference between acceleration and velocity in SHM?
72. What is the phase difference between displacement and displacement in SHM?
73. A bob of simple pendulum is a hollow sphere. If the bob is filled with water how time period changes?
74. The bob of simple pendulum is a hollow sphere filled with water how the time period changes if the water is slowly drained out?
75. Two identical springs of force constant K are connected in series and in parallel what is the effective force constant?
76. What is the force constant? On what factors it depends?
77. A pendulum clock gives correct time at equator. Will it gain or lost time when it is taken to the poles?
78. What happens to the energy of simple pendulum when amplitude is doubled and when time period is doubled?
79. What is the time period of simple pendulum inside the lift when it moves up with acceleration ‘a’ and moves down with acceleration ‘a’?
80. What are the directions of velocity and acceleration at mean position and extreme position?
81. At what displacements the KE is equal to PE of simple oscillator?
82. The acceleration of a particle in SHM is 0.4 m/see2 and displacement 0.1 m. what is the period of oscillation?
83. The maximum velocity of a particle is equal to half of maximum acceleration what is the time period?
84. A body of mass 2 kg attached to the spring of force constant 260 N/m makes 100 oscillation. What is time taken?
85. A simple harmonic oscillator has time period 2 sec. what is the change in phase after 0.25 sec after leaving mean position?
86. The SHM is given by X = 4sin (2πt+π/4). What is the initial displacement?
87. Write the expressions for velocity and acceleration of a particle in SHM when they are maximum and minimum?
88. What is time period and frequency of simple pendulum in freely falling lift?
89. What force is responsible for oscillation of simple pendulum, loaded spring?
90. Why the angular displacement is small for simple pendulum?
91. What happens to the force constant of spring when mass attached to it is doubled?
92. What is the frequency of KE and PE if the frequency of displacement is F?
93. What is second’s pendulum? What is its length and surface of the earth?
94. Define elasticity and plasticity?
95. Define stress. Write units and DF.
96. Define strain. Write units and DF.
97. Define Hook’s law?
98. Define modulus of elasticity. Write units and DF(Y, n, K).
99. What is Poisson’s ratio? What are its theoretical and practical limits?
100.Define proportionality limit and elastic limit?
101.Define elastic fatigue?
102.What are brittle and ductile metals?
103.What is strain energy? Write its equation. What is equation for strain energy per volume?
104.Why steel is more elastic than rubber?
105.What is Young’s modulus of wire if the length of the wire is doubled?
106.What is Young’s modulus for perfect rigid body?
107.Why the spring is made up of steel but not copper?
108.For perfect incompressible body what is the value of Poisson’s ratio?
109.Bridges are declared after long use. Why?
110.What are the sources of errors in Searle’s experiment? How they are eliminated?
111.What are cohesive adhesive forces?
112.Define surface tension. Write units and DF.
113.Define surface energy. How it is related to surface tension?
114.Why the rain drops are spherical in nature?
115.A steel needle placed on surface of water it floats why?
116.What is the effect of temperature on surface tension?
117.What is the behavior of camphor boat placed in water?
118.What happen when hot needle is placed between two match sticks placed on surface of water?
119.Define angle of contact. What are its values for pure water and mercury?
120.How the angle of contact changes with angle of inclination?
121.Write the expressions for excess pressure in liquid drop and soap bubble and air bubble inside liquid.
122.What is the advantage of washing clothes with hot water than cold water?
123.Few drops of water placed between two glass plates it is difficult to separate glass plates why?
124.When the meniscus of liquid surface is convex and concave?
125.What happens to temperature when small drops are combined to form big drop and big drop split into small drops?
126.Write the formula for workdone to soap bubble and liquid drop of radius ‘r’.
127.Write the formula for workdone to increase the radius of soap bubble and liquid drop from ‘r1’ to ‘r2’.
128.What is the formula for workdone when a liquid drop is split into ‘n’ identical droplets?
129.Two soap bubbles of radii ‘r1’, ‘r2’ are in contact, what is the radius of curvature of contact surface?
130.Two soap bubbles of radii ‘r1’, ‘r2’ are combined in isothermal conditions, what is the radius of new bubble?
131.Water rises to a height of ‘h’ cm in capillary tube, to what height the water raises when the same experiment conducted on moon?
132.A capillary tube dipped in water place in lift, what happens to rise of liquid when the lift accelerating upwards with an acceleration ‘g’?
133.Define pressure. Write units and DF.
134.Define pressure energy. What is pressure energy per unit mass and unit volume?
135.What is principle of buoyancy (Archimedean principle)?
136.Do the objects weightless in air than in vacuum?
137.What are the characteristics of fluid flow?
138.Define steady flow and turbulent flow.
139.Write two properties of streamlines.
140.What is critical velocity? On what factors it depends?
141.What is importance of Reynolds’s number?
142.Which conservation principle is involved in equation of continuity?
143.Which conservation principle is involved in Bernoulli theorem?
144.Write any two applications of Bernoulli theorem.
145.For which type of fluids Bernoulli theorem is applicable?
146.Define viscosity. Write Newton’s formula for it.
147.What is velocity gradient? Write its units and DF.
148.Define coefficient of viscosity. Write its units and DF (Dynamic).
149.Define kinematic coefficient of viscosity. Write its units and DF.
150.What is Poiseuille’s equation? Explain terms in it.
151.What is the effect of temperature on viscosity of liquids and gases?
152.Write stroke’s law for viscous force.
153.What is terminal velocity? How it depends on surface area of the body?
154.Why the liquid set into rotation in glass comes to rest after some time?
155.Why castor-oil comes to rest than water set in rotation in a glass?
156.When liquid flows through a tube which layers move fast, which move slowly?
157.Why canals are constructed in V-shape?
158.Why the machine parts are jammed in winter?
159.Why hotter liquid flows faster than cold liquid?
160.When the tap is open why the cross-section of water decrease as water descends?
161.When a spherical ball dropped in a long column of liquid, how the velocity changes when the body attains terminal velocity?
162.1 Pas-second =? Poise.
PROBLEMS (NEW TEXT BOOK)
ROTATORY MOTION:
EX-1, 2, 3, 4, 7, 10, 17, 27, 28
EXERCISE-1, 2, 3, 5, 7, 8, 9, 10, 11, 12, 27, 32, 40
GRAVITATION:
EX-2, 5, 6, 10, 12, 16
EXERCISE-1, 2, 3, 4, 5, 8, 11, 12, 14, 15, 27, 28
SIMPLE HARMONIC MOTION:
EX-1, 2, 6, 11, 12, 13, 14, 18, 19, 20
EXERCISE-1, 2, 3, 5, 6, 7, 10, 11, 21, 22, 23, 26, 27, 38
ELASTICITY:
EX-1, 2, 3, 4, 5, 8, 9, 10, 14
EXERCISE-1, 2, 3, 4, 9, 13, 28, 29, 36, 37
SURFACE TENSION:
EX-1, 2, 4, 5, 7, 10, 11, 13, 14, 15
EXERCISE-1, 3, 7, 8, 9, 14, 15, 16
FLUID MECHANICS:
EX-1, 5, 8, 9, 11, 13
WEIGHTAGE: 1 X 8 = 8 M
3 X 4 = 12M
3X 2 = 6 M
TOTAL = 26 MARKS
UNIT-3
LONG ANSWER QUESTIONS
1. Describe with necessary theory to determine the coefficient of apparent expansion liquid by using specific gravity bottle.(Problem based on unoccupied space in text book)
2. Define volume coefficient of gas. Describe an experiment to determine it (Regnault’s method).
3. Define pressure coefficient of gas. Describe an experiment to determine in (Jolly’s bulb).
4. State gas laws and derive ideal gas equation.
5. Derive the relation between P, V, T in adiabatic process.
6. Describe the method of determination of specific heat of solid by method mixtures.
7. Describe the method of determination latent heat of steam by the method mixtures.
SHORT ANSWER QUESTIONS
1. Write a short note on different scales of temperature.
2. Write a short note on different thermometers.
3. Explain thermal expansions of solids on the basis of potential energy curve.
4. Define α, β, γ of a solid and derive relation between them.
5. Write the examples of thermal expansion of solids in our daily life.
6. Define real and apparent expansions of a liquid and derive relation between them.
7. Describe an experiment to show that water has maximum density at 4°C (Hopes expt).
8. Define pressure and volume coefficient of gas and derive relation between them.
9. State and explain 1st law of thermodynamics?
10. Define molar specific heats of gas and show that Cp-Cv=R.
11. Define isothermal process. Derive expressions for workdone.
12. Define adiabatic process. Derive expressions for workdone.
13. Write the differences between isothermal and adiabatic changes.
14. Explain the working of heat engine.
15. Explain the working of refrigerator.
16. Write a short note on triple point of water.
17. Explain thermal conductivity and coefficient of thermal conductivity.
18. State Kirchhoff’s law of radiation and write its applications.
VERY SHORT ANSWER QUESTIONS
1. Define heat and temp. Write units and dimensional formula.
2. What are LFP and UFP of Celsius and Fahrenheit scales?
3. What is the principle of working of thermometer?
4. What are the advantages of gas thermometers over liquid thermometers?
5. Why mercury is used as thermometric liquid?
6. Why the bulb of thermometer is cylindrical?
7. What is the cause of thermal expansion of solids?
8. Why the gaps are left between rails on a railway track?
9. Why iron tires are heated before fixing on wooden rim of cart?
10. Why platinum is used to seal glass bulbs?
11. Why pendulum clocks and measuring tapes made up of invar steel?
12. Why the glass tumbler breaks when hot water poured on it?
13. Why the chimney breaks when cold water poured on it?
14. Why pendulum clocks go fast in winter and slow down in summer?
15. What is bimetallic strip? What happens when it is heated and cooled?
16. Hot water is poured into a thick tumbler and thin tumbler, which tumbler breaks. Why?
17. Can a substance contract on heating? Give example.
18. Why the liquids do not have linear and areal expansions?
19. Why the liquids have two volume expansions?
20. What is anomalous expansion of water? What is reason for it?
21. How the aquatic animals survive in cold countries?
22. Why the water pipes laid much below the ground in cold countries?
23. Water at 4°C is completely filled in vessel. What happens to the level of water when it is heated and cooled?
24. At what temperature water posses maximum density and minimum volume?
25. Why the gases have both pressure and volume coefficients?
26. Why the gases do not have apparent coefficients of expansions?
27. What is Kelvin scale of temperature?
28. Write the differences between ideal gas and real gas?
29. What is the nature of P-V, P-1/V graphs at constant temperature?
30. What is the nature of V-T graph at constant pressure?
31. What is the nature of P-T graph at constant volume?
32. Write the units and DF of universal gas constant and specific gas constant?
33. Define heat capacity. Write units and DF?
34. Define specific heat capacity. Write units and DF?
35. Define calorie and standard calorie?
36. What is quasi-static process? Is quasi-static process reversible?
37. What is cyclic process? Is cyclic process reversible?
38. What is reversible process? Give examples?
39. What is irreversible process? Give examples?
40. Define Cp, Cv. Why Cp>Cv?
41. Define latent heat. Write units and DF?
42. Define latent heat of fusion, vaporization?
43. State zeroth law of thermodynamics?
44. State 1st law of thermodynamics?
45. Give the statements of 2nd law of thermodynamics?
46. State joules of heating?
47. What is triple point of water? Write its co-ordinates.
48. What are the values of specific heat of gases in isothermal and adiabatic changes?
49. Write expressions for workdone during isothermal and adiabatic changes.
50. Write the relations between P, V, and T in adiabatic process.
51. What is principle caloriemetry?
52. A thermo flask containing liquid vigorously shaken. What happens to its temperature?
53. Define source and sink of a heat engine?
54. Write the expressions for efficiency of heat engine?
55. Write the functioning of heat engine.
56. Write the functioning of refrigerator.
57. A gas expands through a volume dv at constant pressure. What is workdone?
58. What are the different modes of transmission of heat and define them?
59. Define temperature gradient. Write units and DF.
60. Define coefficients of thermal conductivity. Write units and DF.
61. What is thermal resistance? Write units and DF.
62. Write Prevost theory of heat exchanges.
63. What is the velocity and wavelength of thermal radiation?
64. Write two properties of thermal radiation.
65. What is black body? Is black body radiations are black?
66. Define emissive power, absorptive power and emissivity. What are its values for black body?
67. Define Stefan’s law and Stefan’s-Boltzmann’s law.
68. What is the value of Stefan’s constant? Write DF.
69. What is Newton’s law of cooling?
70. Why the roofs of building are painted with white during summer?
71. Why the cooking utensils are provided with copper bottom and wooden handles?
72. Why do the animals curl in order to save themselves from extreme cold conditions?
PROBLEMS (NEW TEXT BOOK)
THERMAL EXPANSION:
EX-1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 17
EXERCISE-1, 3, 4, 5, 6, 7, 8, 17, 19, 20, 21, 22, 26, 28, 30
THERMODYNAMICS:
EX-1, 2, 3, 4, 7, 10, 12, 16, 23
EXERCISE-1, 2, 3, 4, 9, 10, 17, 18, 19, 20, 36, 37, 38, 39, 42, 43, 44
TRANSMISSION OF HEAT:
EX-4, 6
EXERCISE-10, 11
WEIGHTAGE: 1 X 8 = 8M
2 X 4 = 8M
4 X 2 = 8M
TOTAL = 24 MARKS
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