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14. waves and sound — Physics STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 SciencePhysics14. waves and sound1 Mark
MCQ
 In a standing wave on a string rigidly fixed at both ends
  • A
    all the particles must be at their positive extremes simultaneously once in half of the time period.
  • B
    all the particles must be at their positive extremes simultaneously once in a time period.
  • ✓
    in one time period all the particles are simultaneously at rest twice.
  • D
    all the particle are never at rest simultaneously
✓

Answer

Correct option: C.
in one time period all the particles are simultaneously at rest twice.
c
In stationary wave pattern, the particles reaches their extreme position twice in one line period.

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