The loudness and pitch of a sound note depends on
  • intensity and frequency
  • frequency and number of harmonics
  • intensity and velocity
  • frequency and velocity
Energy is not carried by which of the following wave
  • stationary
  • progressive
  • transverse
  • electromagnetic
The phase difference between two waves represented by $y_1=10^{-6} \sin [100 t + (x/50) + .5]$ m $y_2=10^{-6} \cos [100 t + (x/50) ]$ m Where x is expressed in meters and t is expressed in seconds, is approximately
  • 1.07 radians
  • 2.07 radians
  • .5 radian
  • 1.5 radians
The equation of two waves acting in the Perpendicular directions are given as $x=a cos (\omega t + \delta)$ and $y= a cos (\omega t + \alpha)$ Where $\delta= \alpha  + \frac {\pi}{2}$, the resultant wave represents
  • A parabola
  • A circle
  • An ellipse
  • A straight line
In stationary waves, antinodes are the points where there is
  • minimum displacement and minimum pressure change
  • minimum displacement and maximum pressure change
  • maximum displacement and maximum pressure change
  • maximum displacement and minimum pressure change
Two trains move towards each other at the same speed. The speed of the sound is 340 m/s. If the height of the tone of the whistle of one of them  heard on the other changes to 9/8 times, then the speed of each train should be
  • 20 m/s
  • 2 m/s
  • 2000 m/s
  • 200 m/s
In the following questions, a statement of assertion is followed by a statement of reason. You are required to  choose the correct one out of the given five responses and mark it as (a) If both assertion and reason are true and the reason is the correct explanation of the assertion. (b) If both assertion and reason are true but the reason is not the correct explanation of the assertion. (c) If the assertion is true, but the reason is false. (d) If both assertion and reason are false. (e) If the reason is true but the assertion is false Assertion: Sound would travel faster on a hot summer day than on a cold winter day. Reason: The velocity of sound is directly proportional to the square of its absolute temperature.
  • (a)
  • (b)
  • (c)
  • (d)
  • (e)
In the following questions, a statement of assertion is followed by a statement of reason. You are required to  choose the correct one out of the given five responses and mark it as (a) If both assertion and reason are true and the reason is the correct explanation of the assertion. (b) If both assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true, but the reason is false. (d) If both assertion and reason are false. (e) If the reason is true but the assertion is false. Assertion: Ocean waves hitting a beach are always found to be nearly  normal to the shore Reason: Ocean waves hitting a beach are assumed to be plane waves  
  • (a)
  • (b)
  • (c)
  • (d)
  • (e)
In the following questions, a statement of assertion is followed by a statement of reason. You are required to  choose the correct one out of the given five responses and mark it as (a) If both assertion and reason are true and the reason is the correct explanation of the assertion. (b) If both assertion and reason are true but the reason is not the correct explanation of the assertion. (c) If the assertion is true, but the reason is false. (d) If both assertion and reason are false. (e) If the reason is true but the assertion is false Assertion: Sound waves cannot travel in a vacuum but light can travel in a vacuum. Reason: Sound waves are longitudinal waves and  they cannot be polarised but electromagnetic waves  are transverse and they can be polarised
  • (a)
  • (b)
  • (c)
  • (d)
  • (e)
In the following questions, a statement of assertion is followed by a statement of reason. You are required to  choose the correct one out of the given five responses and mark it as (a) If both assertion and reason are true and the reason is the correct explanation of the assertion. (b) If both assertion and reason are true but the reason is not the correct explanation of the assertion. (c) If the assertion is true, but the reason is false. (d) If both assertion and reason are false. (e) If the reason is true but the assertion is false. Assertion: When two vibrating tuning forks having frequencies 256 Hz and 512 Hz are held near each other, beats cannot be heard. Reason: The principle of superposition is valid  only if the frequencies of the oscillators are nearly  equal
  • (a)
  • (b)
  • (c)
  • (d)
  • (e)
A string is cut into three pieces having fundamental frequencies x,y,z respectively.  Then the original fundamental frequency(n) will be
  • n= x + y +z
  • $\frac {1}{n} = \frac {1}{x} + \frac {1}{y} + \frac {1}{z}$
  • n=xyz
  • $n = \frac {x+ y+z}{3}$
Doppler effect in sound takes place when the source and observer are
  • stationary
  • in relative motion
  • moving with the same velocity
  • none of the above
The equation of the wave is given by $y=10^{-4} \cos [100 t - (x/10) ]$ m Then the velocity of the wave will be
  • 1000 m/s
  • 10 m/s
  • 100 m/s
  • 1 m/s
A stationary wave is represented by $y= A sin (100t) cos (.01x) Where y and A are in milimeters, t in sec, and x in m Then the velocity of the wave
  • $10^4$ m/s
  • 1 m/s
  • $10^2$ m/s
  • 2 m/s
To demonstrate the phenomenon of beats, we need
  • two sources that emit radiation of nearly the same frequency
  • two sources that emit radiation of exactly the same frequency
  • two sources that emit radiation of exactly the same frequency and have a definite phase relationship
  • two sources that emit radiation of exactly the same wavelength
When a tuning fork produces sound waves in air, which one of the following is the same in the material of the tuning fork as well as in air?
  • Wavelength
  • Frequency
  • Velocity
  • Amplitude
0 h : 0 m : 1 s

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