Four tuning forks have frequencies 12 Hz, 256 Hz, 18 kHz and 30 kHz

PHYSICS · Single correct · CBSE · Physics · Sound · Sound

Problem

Four tuning forks have frequencies 12 Hz, 256 Hz, 18 kHz and 30 kHz. Which pair of tuning forks will be inaudible to an average human ear? (a)

12\text{ Hz and }18\text{ kHz}

(b)

18\text{ kHz and }30\text{ kHz}

(c)

12\text{ Hz and }30\text{ kHz}

(d)

12\text{ Hz and }256\text{ Hz}