The wavelengths of two sound waves are and

PHYSICS · Single correct · CBSE · Physics · Waves · Waves

Problem

The wavelengths of two sound waves are

49\,\mathrm{cm}

and

50\,\mathrm{cm}

, respectively. If the room temperature is

30^\circ\mathrm{C}

, the number of beats produced per second is approximately, taking the velocity of sound in air at

30^\circ\mathrm{C}

to be

332\,\mathrm{m\,s^{-1}}

, (1) 6 (2) 10 (3) 13 (4) 18