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प्रश्न
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विकल्प
The energy of any small part of a string remains constant in a travelling wave.
The energy of any small part of a string remains constant in a standing wave.
The energies of all the small parts of equal length are equal in a travelling wave.
The energies of all the small parts of equal length are equal in a standing wave.
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उत्तर
The energy of any small part of a string remains constant in a standing wave.
A standing wave is formed when the energy of any small part of a string remains constant. If it does not, then there is transfer of energy. In that case, the wave is not stationary.
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संबंधित प्रश्न
A string of mass 2.50 kg is under a tension of 200 N. The length of the stretched string is 20.0 m. If the transverse jerk is struck at one end of the string, how long does the disturbance take to reach the other end?
A transverse harmonic wave on a string is described by y(x, t) = 3.0 sin (36 t + 0.018 x + π/4)
Where x and y are in cm and t in s. The positive direction of x is from left to right.
(a) Is this a travelling wave or a stationary wave?
If it is travelling, what are the speed and direction of its propagation?
(b) What are its amplitude and frequency?
(c) What is the initial phase at the origin?
(d) What is the least distance between two successive crests in the wave?
Given below are some functions of x and t to represent the displacement (transverse or longitudinal) of an elastic wave. State which of these represent (i) a traveling wave, (ii) a stationary wave or (iii) none at all:
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(a) must move on the X-axis
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