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Waves and Sound — JEE physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceJEE physicsWaves and Sound1 Mark
MCQ
It is possible to hear beats from the two vibrating sources of frequency
  • A
    $100 \mathrm{~Hz}$ and $150 \mathrm{~Hz}$
  • ✓
    $20 \mathrm{~Hz}$ and $25 \mathrm{~Hz}$
  • C
    $400 \mathrm{~Hz}$ and $500 \mathrm{~Hz}$
  • D
    $1000 \mathrm{~Hz}$ and $1500 \mathrm{~Hz}$
✓

Answer

Correct option: B.
$20 \mathrm{~Hz}$ and $25 \mathrm{~Hz}$
(b) For hearing beats, difference of frequencies should be approximately $10 \mathrm{~Hz}$.

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