Question

Two vibrating tuning forks produce waves given $y_1 = 4 \sin 500 \pi t$ and $y_2 = 2 \sin 506 \,\pi t.$ Number of beats produced per minute is

• A. 360
• B. 180
• C. 60
• D. 3

Answer 1

Answer: (B)

180

Answer 2

$y_1 = 4 \sin500\pi t$ and $y_2 = 2\, \sin 506 \pi t.$
$\omega_1=500\pi, \omega_1=2\pi \upsilon, \upsilon_1=250,\upsilon_2=253$
Number of beats per minute = $3\times60=180$.