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Question:
When work is done on a body by an external force, its

1.kinetic energy increases

2.potential energy increases

3.Both kinetic energy and potential energy increases

4.Sum of the kinetic energy and potential energy remains constant

Posted Date:-2021-12-08 11:10:17

More MCQS Questions and answers

  1. A light and a heavy body have equal momenta. Which one has greater kinetic energy?
  2. A nuclide of the element plutonium 94 Pu 242. What is the number of neutrons in its nucleus?
  3. From the following statements pick the correct statement about tunnel diode Statement 1: It uses the property of negative conductance Statement 2: In forward bias the fermilevel of p side becomes higher than the n side It operates at high frequency
  4. If the K.E of a body is increased by 300% its momentum will increase by
  5. If the stone is thrown up vertically and return to the ground, its potential energy is maximum
  6. If the unit of force and length each be increased by four times, then the unit of energy is increased by
  7. The number of protons or atomic number is reduced to 2 by which form of radioactive decay?
  8. The outputs of a NAND gate is 0
  9. A a place where g = 980 cm/sec2 the length of seconds pendulum is about
  10. A body at rest may have
  11. A body of mass 6 kg is under a force which causes displacement in it is given by S = t2/4 mts where t is time. The work done by the force in 2 seconds is
  12. A body of mass M collides against a wall with a velocity V and retraces its path with the same speed. The change in momentum is (take the initial direction of the velocity as positive)
  13. A body of mass m kg is lifted by a man to a height of one metre in 30 seconds. Another man lifts the same mass to the same height in 60 seconds. The work done by them are in the ratio
  14. A bottle of soap water is grasped by the neck and swings briskly in a vertical circle. Near which portion of the bottle do the bubbles collect
  15. A bucket tied at the end of a 1.6 m long spring is whirled in a vertical circle with constant speed. What should be the minimum speed so that the water from the bucket does not spill when the bucket is at the highest position?
  16. A cane filled with water is revolved in a vertical circle of radius 4 metres and the water just does not fall down. The time period of revolution will be
  17. A force of 5 N acts on a 15 kg body initially at rest. The work done by the force during the first second of motion of the body is
  18. A force of 5 N, making an angle θ with the horizontal, acting on an object displaces it by 0.4 m along the horizontal direction. If the object gains kinetic energy of 1 J, the horizontal component of the force is
  19. A lead ball strikes a wall and falls down, a tennis ball having the same mass and velocity strikes the wall and bounces back. Check the correct statement.
  20. A light and a heavy body have equal kinetic energy. Which one has a greater momentum?
  21. A logic gate is an electronic circuit which
  22. A man pushes a wall and fails to displace it. He does (a)
  23. A metal ball falls from a height of 32 metres on a steel plate. If the coefficient of restriction is 0.5 to what height will the ball rise after the second bounce
  24. A nuclear fission reaction becoming self-sustaining depends on
  25. A particle executes S.H.M of amplitude A. At what distance from the mean position is its kinetic energy equal to its potential energy?
  26. A particle of mass m is hanging vertically by an ideal spring of force constant k. If the mass is made to oscillate vertically, its total energy is
  27. A shell initially at rest explodes into two pieces of equal mass, then the two pieces will
  28. A shell of mass m moving with velocity v suddenly breaks into 2 pieces. The part having mass m/4 remains stationary. The velocity of the shell will be
  29. A simple pendulum on length l and mass m is suspended vertically. The string makes an angle θ with the vertical. The restoring force acting on the pendulum is
  30. A transistor has
  31. A1 Kg stone at the end of 1 m long string is whirled in a vertical circle at a constant speed of 4 m/sec. The tension in the string is 6 N, when the stone is at
  32. As the temperature of a transistor goes up, the base-emitter resistance
  33. Boolean Algebra is essentially based on
  34. For a magnet of a time period T magnetic moment is M. If the magnetic moment becomes one-fourth of the initial value, then the time period of oscillation becomes
  35. For a tunnel diode, when p is the probability that the carrier crosses the barrier ‘W’ is the width ‘e’ is energy
  36. Helium nuclei particles are called
  37. How many depletion layers are there in a transistor
  38. How many NAND gates are used to form an AND gate?
  39. How many NAND gates are used to form an AND gate?
  40. If the linear momentum is increased by 50% the kinetic energy will increase by
  41. If the momentum of a body is increased n times, its kinetic energy increase
  42. In a transistor the input impedance is
  43. In an elastic collision of two particles the following is conserved
  44. In the construction of tunnel diode, why is the pellet soldered to anode contact and a tiny dot to the cathode contact via a mesh screen?
  45. Isotopes of an element have a different number of
  46. The atomic number is not changed by which type of radioactive decay?
  47. The base of a transistor is …………. doped
  48. The base-emitter junctions of a transistor is
  49. The coefficient of restitution for a perfectly elastic collision is
  50. The current carries in a PNP transistor is
  51. The displacement of a particle performing simple harmonic motion is given by,x= 8 sin ωt + 6 cos ωt, where distance is in cm and time is in second. The amplitude of motion is
  52. The energy stored in wound watch spring is
  53. The following truth table corresponds to the logic gate Input Output A B X 0 0 0 0 1 1 1 1 1 1 0 1
  54. The length of the second’s pendulum on the surface of the earth is 1m. The length of the same pendulum on the surface of the moon, where the acceleration due to gravity is (⅙)th of the g on the surface of the earth is
  55. The logic behind NOR gate is that it gives
  56. The majority of the carriers from the emitter
  57. The mass and diameter of a planet are twice those of earth. The period of oscillation of pendulum on this planet will be (if it is a second’s pendulum on earth)
  58. The maximum velocity for a particle in S.H.M is 0.16 m/s and maximum acceleration is 0.64 m/s2 .The amplitude is
  59. The neutral atoms of all isotopes of the same element contain the same number of __________.
  60. The output impedance of a transistor is
  61. The output of OR gate is 1
  62. The principle of conservation of linear momentum can be strictly applied during a collision between two particles provided the time of impact is
  63. The standing wave ratio is 4 for a transmission line of 75 ohms. What is the value of the minimum impedance?
  64. The time period of a simple pendulum is T remaining at rest inside a lift. Find the time period of the pendulum when the lift starts to move up with an acceleration of g/3
  65. The Tunnel diode is best suited for
  66. The tunnel diode is mainly used
  67. The tunnelling involves
  68. The tunnelling phenomenon is also known as
  69. The value of input impedance for a matched line will be equal to (a)
  70. The value of α of a transistor is
  71. The work done against gravity in taking 10 kg mass at 1 m height in 1 sec will be
  72. Three types of radioactive elements are emitted when unstable nuclei undergo radioactive decay. Which of the following is not one of them
  73. Tunnel diode operates very fast in the ………. region.
  74. Two balls at same temperature collide. What is conserved?
  75. What are the materials used to make the Tunnel diode?
  76. What is the normally chosen value of the characteristic impedance of a transmission line?
  77. When a retarding force is applied to stop a train, the train stops after 80 m. If the speed is doubled, then for the same retarding force, the distance when the train stops would be
  78. When two atomic nuclei combine it is called as
  79. When work is done on a body by an external force, its
  80. Which among the following is the reason for the depletion layer of the tunnel diode to be very small?
  81. Which logic gate is represented by the following combination of logic gates?
  82. Which of the following logic gate is a universal gate?
  83. Which statement is true for all three types of radioactive emission?
  84. Work done in raising a box depends on
  85. You lift a heavy book from the floor of the room and keep it in the bookshelf having a height of 2 m. This process takes 5 seconds. The work done by you will depend on
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