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PHYSICS CH8 Sound — Science STD 9 — Question

Tamilnadu BoardEnglish MediumSTD 9SciencePHYSICS CH8 Sound1 Mark
MCQ
Assertion : Human beings Cannot hear infrasonic sound.
Reason : Sound with frequency less than 20 Hz is called infrasonic sound.  
  • ✓
    If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
  • B
    If both assertion and reason are true but reason is not the correct explanation of assertion.
  • C
    If assertion is true but reason is false.
  • D
    If assertion is false but reason is true.
✓

Answer

Correct option: A.
If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
(a) Both Assertion and Reason are true and Reason . is the correct explanation of Assertion

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