SAT - Science - Physics - Sound and Wave Motion

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Question - 1

How is a sound wave different than a water wave?

  • A Sound does not travel through water
  • B A sound wave move up and down while water is a compressed wave
  • C A water wave move up and down while sound is a compressed wave 
  • D Both are longitutinal wave

Question - 2

The motion of the particles of air, when sound waves pass through it is

  • A Periodic 
  • B adiabatic
  • C isothermal
  • D oscillatory but not periodic

Question - 3

A pendulum suspended from the ceiling of a train has a time period T when the train is at rest. When the train is accelerating with a uniform acceleration, the time period will

  • A increase
  • B decrease
  • C become infinite
  • D remain unaffected

Question - 4

The time period T is found to depend upon L as

  • A \(T\propto L\)
  • B \(T^{ 2 }\propto L\)
  • C \(T\propto L^{ 2 }\)
  • D \(T\propto \sqrt { 1/L } \)

Question - 5

Through which of the following media does sound travels fastly?

  • A steel
  • B cold air
  • C warm air
  • D water

Question - 6

If a pendulum is allowed to oscillate into a jar containing water its time period will

  • A increase
  • B decrease
  • C remain same
  • D none of the above

Question - 7

K.E of  the bob of a simple pendulum is maximum

  • A at the mean position
  • B at the extreme left position
  • C at the extreme right position
  • D between mean and extreme position

Question - 8

When the bob is in the central position, the forces are

  • A balanced
  • B unbalanced
  • C sometimes balanced and sometimes unbalanced
  • D equilibriant

Question - 9

The length of a pendulum is doubled and the mass of its bob is halved. Its time period would become

  • A double
  • B half
  • C \(\sqrt { 2 } \) times
  • D 4 times

Question - 10

The phenomenon in which the amplitude of oscillation of a pendulum decreases gradually is called 

  • A building up of oscillation
  • B maintained oscillation
  • C decay period of oscillation
  • D damping