Whole XI Physics Mdcat Online Test-1

1. The speed of wave in a medium is 760 m / s. If 3600 waves are passing through a point in the medium in 2 minutes, then its wavelength is

2. The range of human hearing is Typically:

3. Sound travels fastest through:

4. A gun after firing recoils due to

5. A ball of mass 2 kg travelling at 8 ms’ strikes a ball of mass 4 kg travelling at 2 2 ms-“.
Both balls are moving along the same straight line as shown

After collision, both balls move at the same velocity, What A the magnitude of the
Velocity

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6. Displacement time graph of a ball thrown vertically upward is shown in figure:

Which of the following represents v-t graph:

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Image 2

7. Power transmitted by travelling wave depends upon:

8. A ball is thrown vertically upward with a velocity of 98 m/sec; how high does the ball

rise?

9. Which of the following is NOT a use of the Doppler effect?

10. Which term describes an object Traveling faster than the speed of Sound?

11. Shock waves are produced when:

12. If the intensity level of a sound is 40 dB, what is the intensity of the sound in W/m²? (Reference intensity = 10‐¹² W/m²)

13. Projection of UCM executes SHM, then which of the following changes with time?

I) Velocity

II) Acceleration

Il) Time period

IV) Frequency

14. The slope of velocity-time graph for motion with uniform velocity is equal

to:

15. Absolute gravitational potential is:

16. Which of the following is correct about KE?

17. Conservation of momentum in a collision between particles can be understood from:

18. A horizontal force of 10N is necessary to just hold a block stationary

against a wall. The coefficient of friction between the block and the wall is 0.2. the weight of the block is:

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19. At the top of the trajectory of a projectile, the acceleration is:

20. The necessary condition for waves to superpose upon each other is that they must have:

21. The slope of a velocity-time graph gives the:

22. Starting from rest, a body slides down a 45° inclined plane in twice the time it takes to slide down the same distance in the absence of friction, the coefficient of friction between the body and the inclined plane is:

23. An object moves in a circular path Of radius 10 meters with an angular Frequency of 2rad/sec . What is the Object’s linear speed?

24. Torque is defined as:

25. A satellite is orbiting the Earth in a Circular orbit. Which of the Following statements is incorrect?

26. If the mass of an object moving in A circular path is doubled while the Radius and the speed remain Constant, how does the centripetal Force change?

27. If the applied force is doubled, then coefficient of friction is

28. The sound speed at 0°C is 332 m/s, the speed of sound at 100°C will be?

29. Upon catching a ball, a cricket fielder swings his hands backwards, the Concept behind this is explained by:

30. Two bodies A’ and ‘B’ travel from point ‘P’ to point ‘Q’, if both Bodies chose different paths to reach from P> to Q’ in same time, Then mark correct statement.

31. The ratio between the speeds of two trains is 9:4, if the second train  Runs 400km in 4 hours, then what is the speed of the first train?

32. The length of second pendulum on the surface of moon is:

33. A player standing on height of 4.9 m above the ground strikes a ball horizontally with velocity of 20 m s–1, what is the speed of the ball 0.80 sec after hitting the ball?

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34. The initial velocity of the particle decelerating at rate of 2m/sec² Is  20m /sec, what is displacement covered by particle in 4^th second :

35. Which of the following can change momentum of body?

36. For a stationary wave on a string Fixed at both ends, the distance Between two consecutive nodes is 0.5 meters. What is the wavelength Of the stationary wave?

37. A wave travels along a string with a Frequency of 10 Hz and a Wavelength of 2 meters. What is the Speed of the wave?

38. A rotating disk has a radius of 5 Meters and accelerates uniformly From rest to an angular velocity of 20 radians per second in 10 Seconds. Find the total distance traveled by a point on the edge of The disk during this time

39. A mass of 0.4 kg is attached to a Spring with a spring constant of 120 N/m. What is the angular frequency Of the system?

40. In a mass-spring system undergoing

Simple harmonic motion, if the mass Is doubled and the spring constant Remains the same, the period of Oscillation:

41. .In a simple harmonic oscillator, if

The amplitude is doubled while Keeping the spring constant the Same, the energy stored in the System:

42. In simple harmonic motion, the Acceleration of an object is:

43. The angular velocity of an object in Circular motion is:

44. Power is defined as:

45. If the frequency of a sound wave is Doubled while its speed remains Constant, what happens to its wavelength?

46. The period of a simple pendulum Depends on:

47. The acceleration of particle executing simple harmonic motion is 12cm/s? at a distance  3cm from mean position. Its time period is:

48. The energy possessed by the body by virtue of its motion is known as?

49. If the intensity of a sound Increases by a factor of 100, by How many decibels does the sound Level increase?

50. The speed of sound in a medium depends on which of the following Properties?

51. A Change faced by air when sound travels through it:

52. If time increase two times then range and height increase ___ times if angle of projection is same

53. Which one of the following is not related to projectile motion?

54. The ratio between linear velocity and radius equals to:

55. What is the time rate of change of linear momentum?

56. 1 J/sec is equals to

57. If the given spring of spring constant K is cut into three identical  Segments the spring constant of each segment is:

58. A helicopter of weight “W” is ascending with zero acceleration. The Upward force ‘F’ on it is:

59. What force should be applied on a 10 Kg body so that it moves down in a vacuum with an
Acceleration of 3 m/s2:

60. Two blocks X and Y, of masses (m) and (2m) respectively, are accelerated along a smooth

horizontal surface by a force (F) applied to block X, as shown in the diagram:

What is the magnitude of the force exerted by block Y on block X during this acceleration?

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61. The unit of momentum is

62. The frequency of the Second pendulum is

63. As the particle moves in from infinity,the value of Absolute gravitational potential

Energy:

64. 1KWh =

65. If a car collides with a housefly what will the magnitude of force experienced by

Housefly?

66. The work done against gravity in taking 5kg mass up to 5m height in 1sec will be:

67. A car is moving with a speed of 36km/h, if mass of car is 1000kg, then its kinetic energy is:

68. A car is accelerating up a slope. What are the changes in its kinetic energy and gravitational potential Energy as it is moving up the slope?

69. Beats are result of

70. Range of projectile is maximum at:

71. A stone is just released from the window of a car moving with uniform velocity along a horizontal Straight road, the path of stone will be _______ as observed by observer on ground.

72. In SONAR we use

73. Match the terms appropriately

74. If the diameter of the earth becomes two times its present value and its mass remains Unchanged, then how would the weight of an object on the surface of the earth be affected?

75. A stone is dropped from a certain height can reach the ground in 5s. It is stopped after 3 seconds of its fall and then allowed to fall again. Find the time taken by the stone to reach the ground for the remaining distance

76. A car covers the first half of a certain distance with a speed V1 and the second half with a speed V2. Find The average speed during the whole journey?

77. The radius of the moon is 27% of the earth’s radius and its mass is 1.2% of the earth’s mass. Find the acceleration due to gravity on the surface of the moon.

78. A rescue helicopter drops a package of emergency ration to stranded party on the ground. If the helicopter is traveling horizontally at 40 m/s at a height 100m above the ground, where does the package strike the ground relative to the point at which it was released? (g = 9.8 m/s2)

79. Every particle of a rotating disc moves with:

80. When a body moves with uniform velocity then its:

81. A ball moving horizontally with speed ‘v’ strikes the bob of a simple pendulum at rest. The mass of the bob is equal to that of a ball. If the collision is elastic, the bob will rise to a height.

82. In the projectile motion, the acceleration in the horizontal direction:

83. In standing waves, the distance between two consecutive nodes or anti-nodes is :

84. If the fundamental frequency of vibration of a string fixed both ends is

50Hz, the fourth harmonic will be:

85. The speed of sound at 0°C in air is 332 m/s. What will be the speed of

Sound at 50°C?

86. The absolute gravitational potential energy “U” of an object of mass ‘m’ on earth’s surface is Given by:

87. General law of Conservation of energy was enunciated by

88. Absolute potential energy is zero at:

89. FPS unit of power is:

90. Which of the following statements regarding UCM is true?

91. 1 Radian =

92. Which one of them doesn’t remain constant in UCM?

93.

In the diagram, compare the initial velocity, ke and momentum with final velocity, ke and momentum, which of the following statements is/are wrong?
i. The initial velocity is equal to final velocity
ii. The initial momentum is not equal to final momentum
iii. KE remains constant throughout the motion, hence initial KE is equal to final KE
iv. The initial velocity is not equal to final velocity

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94. The projectile is fired from some height making some angle horizontal., the time it would take to reach the ground is.

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95. When projectile is fired aT 90°+theta and 90°-theta, Then

96. Work done against gravity between two close points is equal to 𝒘 =

97. ___ Work is done one moves along horizontal carrying load on his head and shoulder

Maximum

98. The Doppler effect in sound waves is observed when:

99. An object attached to one end of a spring makes 20 vibrations in 10 sec . Its angular frequency is:

100. A S.H.M. has amplitude 'a' and time period T. The maximum velocity will be