CBSE  /  Class 11  /  Physics  /  Oscillations

  • 1. 
    damped oscilation the directions of the restoring force and the resistive force

  • are the same
  • are opposite
  • may be same or opposite
  • have no relation with each other

  • 2. 
    The displacement y of a particle executing periodic motion is given by y = 4 cos² (t/2) sin (1000t). This expression may be considered to be a result of superposition of the following number of harmonic motions.

  • two
  • three
  • four
  • five

  • 3. 
    Spring is pulled down by 2 cm. What is amplitude of motion?

  • 0 cm
  • 6 cm
  • 2 cm
  • cm

  • 4. 
    One of the two clocks on the earth is controlled by a pendulum and other by a spring. If both the clocks are taken to the moon, then which clock will have the same time - period of the earth?

  • spring clock
  • pendulum clock
  • both
  • none

  • 5. 
    When a particle performing uniform circular motion of radius 10 cm undergoes the SHM, what will be its amplitude?

  • 10 cm
  • 5 cm
  • 2.5 cm
  • 20 cm

  • 6. 
    For a magnet of 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.

  • Half of initial value
  • One fourth of initial value
  • Double of initial value
  • Four time initial value

  • 7. 
    Time period of simple pendulum of length l and a place where acceleration due to gravity is g is T. what is the period of a simple pendulum of the same length at a place where the acceleration due to gravity is 1.029 is,

  • T
  • 1.02 T
  • 0.99 T
  • 1.01 T

  • 8. 
    In the case of forced oscillations, which of the following statements is not true?

  • frequency equals that of external periodic force
  • amplitude depends upon the damping coefficient
  • amplitude tends to infinity at resonance
  • higher the damping coefficient, lower is the amplitude at resonance

  • 9. 
    The motion of a particle executing simple harmonic motion is given by X = 0.01 sin 100p (t + 0.05), where X is in metres ant t in second. The time period in second is

  • 0.001
  • 0.02
  • 0.1
  • 0.2

  • 10. 
    In damped oscilation, the angular frequency of the oscillator

  • keeps on decreasing
  • keeps on increasing
  • emains the same
  • fluctuates
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