Question 110: Waves

Question

A tuning fork is vibrating at 250 Hz. The length of the shortest closed organ pipe that will resonate with the tuning fork will be __________ cm. (Take speed of sound in air as 340 ms$$-$$1)

Accepted Answer

$${\lambda  \over 4}$$ = l $$\Rightarrow$$ $$\lambda$$ = 4l
f = $${V \over \lambda } = {V \over {4l}}$$
$$\Rightarrow$$ 250 = $${{340} \over {4l}}$$
$$\Rightarrow$$ l = $${{34} \over {4 	imes 25}}$$ = 0.34 m
l = 34 cm

Waves

A tuning fork is vibrating at 250 Hz. The length of the shortest closed organ pipe that will resonate with the tuning fork will be __________ cm. (Take speed of sound in air as 340 ms$-$1)

Choose the correct answer: