Q. 12
The displacement A. It represents a progressive wave of frequency 60Hz.
B. It represents a stationary wave of frequency 60Hz.
C. It is the result of superposition of two waves of wavelength 3 m, frequency 60Hz each travelling with a speed of 180 m/s in opposite direction.
D. Amplitude of this wave is constant.
Answer :
C. It is the result of superposition of two waves of wavelength 3 m, frequency 60Hz each travelling with a
Speed of 180 m/s in opposite direction.
Explanation: As the equation involves harmonic functions and
separately, it represents a stationary wave.
The given equation is: ------------------- (i)
Which is travelling along positive x-axis and is superimposed by the reflected wave
Also, is a stationary wave travelling in opposite direction
------------------------ (ii)
By comparing equations (i) and (ii),
Also,
Or,
Frequency
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