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UPSC Combined Geo-Scientist

Chemist

  • 2 objective papers
  • 120 questions each
  • 2 h per paper
  • 100 + 300 marks

Prelims Paper I covers general studies.

UPSC Combined Geo-Scientist, Prelims · 2021 · Paper I, General Studies · Q65 of 120

Geo-Scientist Prelims 2021 General Studies Q65: Which one of the following statements with regard to ultrasonic…

QuestionPhysics / sound waves

Which one of the following statements with regard to ultrasonic waves is NOT correct?

  1. (a) Ultrasonic waves have frequency above 20 kHz
  2. (b) Ultrasonic waves are longitudinal waves
  3. (c) Ultrasonic waves can travel through water
  4. (d) Ultrasonic waves can travel through vacuum

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