Question

A vibrating tuning fork generates a wave given by y = 0.1 sin p(0.1x – 2t), where x and y are in metre and t in second. The distance travelled by the wave while the fork completes 30 vibrations is –

• A. 600 m
• B. 20 m
• C. 30 m
• D. 200 m

Answer 1

Answer: (A)

600 m

Answer 2

Comparing the equation with the standard equation,

y = a sin $\frac{2\pi}{\lambda}$ (vt – x)

we get $\frac{2\pi}{\lambda}$= 0.1p or l = 20 m

\ The distance travelled = 20 m × 30 = 600 m