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When a sound wave is reflected from a wall, the phase difference between the reflected and incident pressure wave is:

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Important Questions on Wave Motion on a String

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Alpha Question Bank for Medical: Physics>Chapter 20 - Wave Motion on a String>Exercise-1>Q 25
The frequency of a fork A is 3% more than the frequency of a standard fork whereas the frequency of fork B is 3% less. The forks A and B produce 6 beats per second. The frequency of standard fork will be
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Alpha Question Bank for Medical: Physics>Chapter 20 - Wave Motion on a String>Exercise-1>Q 26
A tuning fork produce 2 beats when sounded with one oscillator of frequency 514 Hz, and produces 6 beats with the other oscillator of frequency 510 Hz. The frequency of tuning fork is:
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Alpha Question Bank for Medical: Physics>Chapter 20 - Wave Motion on a String>Exercise-1>Q 27
26 tuning forks are arranged in a line having beat frequency of 4 between two successive tuning forks. If frequency of last tuning fork is 3 times that of 1st tuning fork, then find the frequency of 1st tuning fork,
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Alpha Question Bank for Medical: Physics>Chapter 20 - Wave Motion on a String>Exercise-1>Q 29
Hertz is a unit of :
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Alpha Question Bank for Medical: Physics>Chapter 20 - Wave Motion on a String>Exercise-1>Q 30
A particle is oscillating according to the equation x=7cos0.5πt , where t is in second. The point moves from the position of equilibrium to maximum displacement in time
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Alpha Question Bank for Medical: Physics>Chapter 20 - Wave Motion on a String>Exercise-1>Q 31
A simple harmonic oscillator has an amplitude a and time period T. The time required by it to travel from x=a to x=a2 is 
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Alpha Question Bank for Medical: Physics>Chapter 20 - Wave Motion on a String>Exercise-1>Q 33
A microphone converts
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Alpha Question Bank for Medical: Physics>Chapter 20 - Wave Motion on a String>Exercise-1>Q 63
Which of the following is independent of wavelength? (k=Propagation constant, ω = angular frequency)?