Waves CBSE Questions & Answers

Waves

This is Physics Class 11 Waves CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
in wave propagation
  • A
    there is no flow of matter and there is no movement of disturbance
  • B
    there is no flow of matter but there is movement of disturbance
    Correct
  • C
    there is flow of matter and there is no movement of disturbance
  • D
    there is flow of matter but there is movement of disturbance
2
When we make a mobile telephone call to a friend
  • A
    the friend's mobile receives acoustic waves containing your audio
  • B
    the friend's mobile generates possible electrical signals
  • C
    the friend's mobile receives electromagnetic waves containing your audio
    Correct
  • D
    the friend's mobile receives gravity waves containing your audio
3
Electromagnetic waves are different from sound waves in that
  • A
    they need medium and are transverse
  • B
    they need medium and are longitudinal
  • C
    they need no medium and are transverse
    Correct
  • D
    they need no medium and are longitudinal
4
Matter waves are useful in
  • A
    explaining quantum mechanical phenomenon
    Correct
  • B
    explaining astronomical phenomenon
  • C
    explaining gravitational phenomenon
  • D
    explaining tidal wave phenomenon
5
The quantity similar to extension or compression of the spring in sound wave propagation (air) is
  • A
    the change in air composition
  • B
    the change in air humidity
  • C
    the change in air particles
  • D
    the change in air density
    Correct
6
in transverse waves, the constituents of the medium
  • A
    oscillate parallel to the direction of wave propagation
  • B
    oscillate perpendicular to the direction of wave propagation
    Correct
  • C
    oscillate at 30\(^\circ \) to the direction of wave propagation
  • D
    oscillate at 40\(^\circ \) to the direction of wave propagation
7
in longitudinal waves, the constituents of the medium
  • A
    oscillate at 40\(^\circ \) to the direction of wave propagation
  • B
    oscillate along the direction of wave propagation.
    Correct
  • C
    oscillate at 30\(^\circ \) to the direction of wave propagation
  • D
    oscillate perpendicular to the direction of wave propagation
8
Travelling or progressive wave
  • A
    travels from one point of the medium to another
    Correct
  • B
    does not move from one point of the medium to all others
  • C
    does not move from one point of the medium to another
  • D
    does not move from one point of the medium to any other
9
The waves on the surface of water are of two kinds:.
  • A
    sound waves and gravity waves
  • B
    capillary waves and sound waves
  • C
    seismic waves and cosmic waves
  • D
    capillary waves and gravity waves
    Correct
10
in the same medium transverse and longitudinal waves
  • A
    travel changing transverse wave to longitudinal wave
  • B
    travel changing longitudinal wave to transverse wave
  • C
    travel with different speeds
    Correct
  • D
    travel with same speeds
11
If y(x, t) = a sin (kx + \(\omega \)t + \(\varphi \)) represents a wave function
  • A
    direction of travel is sometimes –ve x and +x at other times
  • B
    travelling in the -ve x direction
    Correct
  • C
    the equation does not tell the direction
  • D
    travelling in the +ve x direction
12
If y(x, t) = a sin (kx + \(\omega \)t + \(\varphi \) ) represents a wave function then ‘a’ is
  • A
    the frequency
  • B
    the phase
  • C
    the period
  • D
    the amplitude
    Correct
13
If y(x, t) = a sin (kx + \(\omega \)t + \(\varphi \) ) represents a wave function then ‘k’ is
  • A
    the period
  • B
    the angular wave number
    Correct
  • C
    the frequency
  • D
    the phase
14
If y(x, t) = a sin (kx + \(\omega \)t + \(\varphi \) ) represents a wave function then ‘\(\omega \)’ is
  • A
    the frequency
    Correct
  • B
    the period
  • C
    the phase
  • D
    the wave number
15
If y(x, t) = a sin (kx + \(\omega \)t + \(\varphi \) ) represents a wave function then ‘\(\varphi \)’ is
  • A
    the wave number
  • B
    the initial phase angle
    Correct
  • C
    the frequency
  • D
    the period