Applied Physics 1, Question Paper of BE 1 and 2 Semester,Download Previous Years Question Paper 5

S.B. Roll No………..

APPLIED PHYSICS

1^st Exam/Common/5403/0351/Dec’11

Duration: 2^1/2 Hrs.                                                                 Max. Marks: 75

1.     Weight of force is called

a.     Torque

b.     Weight

c.      Moment of inertia

d.     Angular momentum

2.     Moment of inertia is independent of

a.     Mass of body

b.     Shape of body

c.      Location of axis of rotation

d.     Torque on the body

3.     If earth shrinks suddenly to half of its present radius without change in mass, the duration of the day will be

a.     24 hours

b.     6 hours

c.      96 hours

d.     12 hours

4.     A boy suddenly  comes and sits on a circular rotating table. What will remain conserved?

a.     Linear momentum

b.     Kinetic energy

c.      Angular momentum

d.     None of these

5.     When the spring is loaded, the strain produced is

a.     Longitudinal

b.     Volumetric

c.      Shearing

d.     None

6.     The property of metals which allows them to be drawn into thin wires beyond their elastic limit without rupture is called

a.     Ductibility

b.     Elasticity

c.      Malleability

d.     Hardness

7.     In steel the Young’s modulus and the strain at the breaking point are 2x10¹¹ Nm^-2 and 0.15 respectively. The stress at the breaking point for steels is therefore

a.     1.33x10¹¹Nm^-2

b.     7.5x10^-3Nm^-2

c.      1.33x10¹²Nm^-2

d.     3x10¹⁰Nm^-2

8.     If the temperature of a liquid is raised, then its surface tensionis

a.     Decreased

b.     Increased

c.      Irregular

d.     Equal to viscosity

9.     Due to capillary action a liquid will fall in a tube, if the angles of contact is

a.     Acute

b.     Obtuse

c.      90^O

d.     Zero

10.                         The CGS unit of coefficient of viscosity is

a.     Poise

b.     Newton

c.      Kg-m^-1s^-1

11.                        The clouds float in atmosphere because of

a.     Their low temperature

b.     Their low viscosity

c.      Their low density

d.     Creation of low pressure

12.                        The menisas of mercury in a capillary tube is

a.     Convex

b.     Concave

c.      Plane

d.     Uncertain

13.                        Hooke’s law essentially defines

a.     Stress

b.     Strain

c.      Field point

d.     Elastic limit

14.                         Unit of modulus of elasticity is

a.     Dyne/cm

b.     Dyne/cm²

c.      Dyne-cm

d.     Dynes

15.                        Which one of the following quantities does  not have the unit of force per unit area

a.     Stress

b.     Strain

c.      Young’s modulus of elasticity

d.     Pressure

16.                        Water is flowing through a tube of non-uniform cross-section. If the ratio of the radius of the tube at the entrance and exit is 3:2 then the ratio of velocity of liquid entering and leaving the tube is

a.     8:27

b.     4:9

c.      1:1

d.     9:4

17.                        Soap helps in better cleaning of clothes because

a.     It reduces the surface tension of solution

b.     It gives strength of solution

c.      It absorbs the dirt

d.     Chemical of soaps change

18.                        The temperature of a gas is a measure of

a.     The average Kinetic energy of gaseous molecules

b.     The average potential energy of gaseous modulus

c.      The average distance between the molecules of the gas

d.     The size of the molecules of the gas

19.                        The temperature of a patient is 40^OC, his temperature of Fahrenheit scale will be

a.     104^OF

b.     72^OF

c.      96^OF

d.     100^OF

20.                        When water is heated from 0^OC to 100^OC its volume

a.     Increases

b.     Decreases

c.      Remains unchanged

d.     First decreases and then increases

21.                         Mercury thermometers can be used to measure a temperature upto

a.     100^OC

b.     212^OC

c.      500^OC

d.     360^OC

22.                        If a bimetallic strip is heated it will

a.     Twist itself into a helix

b.     Not bend at all

c.      Bend towards the metal with lower thermal expansion coefficient

d.     Bend towards the metal with higher thermal expansion coefficient

23.                        The process by which sun’s rays reach the earth is

a.     Radiation

b.     Conduction

c.      Convection

d.     Diffusion

24.                        The velocity of heat radiation in vacuum is

a.     Equal to that of light

b.     Less than that of light

c.      Greater than that of light

d.     Equal to that of sound

25.                        By increasing the temperature of a liquid is

a.     Volume and density decrease

b.     Volume and density increase

c.      Volume increases and density decreases

d.     Volume decreases and density increases

26.                         In Searle’s method for finding conductivity of metals, the temperature gradient along the bar

a.     Is greater near the hot end

b.     Is great near the cold end

c.      Is same at all points along the bar

d.     Increases as we go from hot end to cold end

27.                        The thermometer suitable to measure 2000^OC is

a.     Gas thermometer

b.     Mercury thermometer

c.      Vapour-pressure thermometer

d.     Total radiation pyrometer

28.                        A piece of ice at 0^OC is put into a vessel containing water 0^OC. The ice will

a.     Melt

b.     Slightly melt

c.      Not melt

d.     Vanish in no time

29.                        Two bodies are said to be in thermal equilibrium if they have the same

a.     Temperature

b.     Amounts of heat

c.      Specific that

d.     Thermal capacities

30.                        A person of mass 60kg climbs up 20m long staircase to the top of a building 10m high. If g=10ms^-2 what is the work done by him?

a.     3KJ

b.     6KJ

c.      12KJ

d.     24KJ

31.                        A body measures 8N in air and 5N in water. The buoyant force is

a.     3N

b.     13N

c.      8N

d.     5N

32.                         The transmission by conduction is most prominent in

a.     Liquids

b.     Solids

c.      Gases

d.     Liquids and gases

33.                        A body floats in a liquid contained in a beaker. The whole system is falling under gravity, the upthrust on the body due to liquid is

a.     Zero

b.     Equal to weight of body in air

c.      Equal to weight of liquid displaced

d.     Equal to weight of impressed part of the body

34.                        The minimum resultant of two forces 4N and 3N is

a.     7N

b.     4N

c.      3N

d.     1N

35.                        If F=8i-2j and r=6i^+8k^ then F.R will be

a.     6 units

b.     8 units

c.      32 units

d.     48 units

36.                        Dimensions of impulse are

a.     [ML^-1T^-2]

b.     [ML^-2]

c.      [MLT^-1]

d.     [ML^-1T^-3]

37.  Which of the following has the smallest value?

    a. Fermi

    b. millimeter

    c. angstrom

    d. micron

38 The radius of a sphere is 5cm. Its volume will be given by

    a. 523.33cm³

    b. 5.0x 10²cm³

    c. 5.23x10²cm³

      d. 5x10²cm³

39. The error in the measurement of radius of sphere is 0.3%. What is         percentage error in measurement of its volume?

    a. 0.3%

    b. 0.6%

    c.0.9%

    d.4/3(0.3)³

40. An experiment measures quantities a,b,c and X is calculated from the    formula  X=ab²/c³

    The percentage errors in a,b,c are 1%, 3% and 2% respectively. The           percentage error in x can be

    a. 13%

    b.4%

    c.7%

    d.1%

41. If f=x², then the relative error in f is

    a. ∆x/x

    b. (∆x)²/x

    c. (∆x)²

      d. 2∆x/x

42. The density of the material of a cube is measured by measuring its mass         and lengths of its sides, if the maximum errors in the measurement of mass    and the length and 3% and 2% respectively, the maximum error in the      measurement of density is

    a. 1%

    b. 9%

    c. 5%

    d. 7%

43. The significant figures in 0.009 is

    a. 1

    b.3

    c.2

    d.4

44.The velocity ‘v’ of a particle is given in terms of time ‘t’ as  v=at+

     The dimensions of a,b,c, are

    a. [L²][T][LT^-2]     b.  [LT^-2][L][T]

    c. [LT^-2][LT][L]     d.  [L][LT][T²]

45. The dimensions of quantities in  one or more pairs  of the following are                    same. Identify the  pair

a.  torque and force

b.  angular  momentum and work

c.   energy and Young`s   modulus

d.   light year  and  wave length

46.Checking the correctness of equation using the method  of  dimensions is         based  on

a.   equality of inertial fames of reference

b.    the types  of  system of units

c.    principle of homogeneity of dimensions

d.   none of these

47. [M¹L²T^-2] represents

a. force

b. pressure

c. work

d. Planck’s constant

48. Which of the following quantities is a scalar?

a. mass

b. velocity

c. momentum

d. displacement

49.The minimum number of vectors  of unequal magnitude required to produce    zero resultant is 

a.  2

b.  3

c.  4

d. more than 4

50. Two vectors A and B obey the relation A+B=A-B and  is angle between       them, then

 a. ^O

b.  B = 0

c. ^O

d. A = 0

51. Two vectors A and B are A= 2i^+5k^ and B=3j^ + 4k^ their scalar product    is

a. 20

b. 23

c. 26

d. 5

52. The condition of vectors A and B to be perpendicular is

a. A. B = 1

b. A x B= 0

c. A.B.= 0

d. A x B= 1

53. Give A=5i^+7j^-3k and B=2i^+2j-mk. If A and B are perpendicular      vectors, then value of m is

a. -2

b. -7

c. 8

d.-8

54. A vehicle is moving with a uniform speed ‘v’ on a curved road of width ‘b’    and radius of curvature ‘R’. For providing the centripetal force to the   vehicle, the angle of elevation required between the outer and inner edges of         the road is

a. tan

b.  tan

c. tan

d. tan

55. Two cars of masses M₁ and M₂ are revolving with same speed on circular       paths of radii r₁ and r₂ respectively.  The ratio of their centripetal        accelerations will be

a.  

b.

56. Newton’s second law of motion connects

a. momentum and acceleration

b. change of momentum and velocity

c. rate of change of momentum and external force

d. rate of change of force and momentum

57. A particle is moving with a constant speed along a straight-line path.  A         force is not required to

a. increase its speed

b. decrease its momentum

c. change its direction

d. keep it moving with the same speed

58. Action and reaction forces do not balance each other because they

a. act on the same body

b. do not act on the same body

c. are in opposite directions

d. are not equal

59. An athlete runs some distance before taking a long jump so that he may

a. acquire large inertia of motion

b. overcome inertia of rest

c. get inertia of direction

d. acquired Kinetic energy

60. A machine gun fires  a bullet of mass 40gm with velocity 1200ms^-1. The          person holding it can apply a maximum force of 144 Newton on the gun.  The maximum number of bullets that can be fired per second in

 a. 3

b. 4

c. 5

d. 7

61. A force of 5N acts on a body of weight 9.8N. What is the acceleration   produced in M/s².

a. 49.0

b. 1.96

c. 5.0

d. 0.51

62. The limiting friction between two bodies in contact independent of

a. nature of surfaces in contact

b. the area of surfaces in contact

c. normal reaction between the surfaces

d. all of the above

63. The Kinetic friction is always

a. less than rolling friction

b. equal to rolling friction

c. greater than rolling friction

d. may be less than, greater or equal to rolling friction

64. A force of 98N is required to pull a body of mass 100Kg over ice. The coefficient of friction is

a. 0.1

b. 0.8

c. 0.98

d. cannot be determined

65. The energy stored in a watch spring is

a. Kinetic energy

b. potential energy

c. heat energy

d. chemical energy

66. A motor boat is travelling with a speed of 30ms^-1. If the force on it due to       water flow is 500N, the power of the boat is

a. 150KW

b. 1.5KW

c. 15KW

d. 150W

67. Nms^-1 is the unit of

a. impulse

b. power

c. energy

d. work

68. When the force retards the motion of a body the work done is

a. zero

b. negative

c. positive

d. +ve or –ve depending upon situation

69. If the momentum of a body is doubled, the Kinetic energy is

a. halved

b. unchanged

c. doubled

d. increased four time

70. A body falling from a height of 10m rebounds from the floor. If it loses 2%    of energy in the impact, how high will it rebound?

a. 10m

b. 8m

c. 12m

d. none of the above

71. A uniform force of 4N acts on a body of mass 8Kg for a distance of 2.0m.

a. 8J

b. 64J

c. 4J

d. 16J

72. A force F acting on a body moving in a circle of radius r is always                   perpendicular to the instantaneous velocity v. The work done by the force on   the body in one complete revolution is

a. Fv

b. Fr

c. F.2

d. 0

73. Watt day is the unit of

a. power

b. energy

c. force

d. none

74. A hollow sphere and a solid sphere of same mass and radius are allowed to    roll down an inclined plane from same height simultaneously. Which will       read the bottom first

a. hollow sphere

b. solid sphere

c. both together

d. none of the above

75. Mass in linear motion has its analog in rotational motion

a. moment of inertia

b. angular momentum

c. torque

d. weight