Question

The air column in a closed pipe experience first resonance with a tuning fork of frequency 264 Hz. If the length of the air column in the closed pipe is ..... cm. The speed of the sound in air is 330 m/s.
(a) 31.25
(b) 62.50
(c) 93.75
(d) 125

Answer 1

Answer:

i think b is correct answer

Answer 2

The length of the air column is 0.9375 cm

Explanation:

Given,

Speed of sound in air, V = 330 m\s

Frequency , f = 264 Hz

For a closed organ pipe,

$f = n \times \left ( \frac{V}{4 \times l} \right )$

Where , n = 1,3,5

or,

$l = \frac{n\times V}{4 \times f}$

$l = \frac{n \times 330}{4\times 264}$

$l = 0.3125\times n$

Put n = 3 and n = 5

Then,

l = 0.9375 and 1.5625

l = 0.9375 cm

The length of the air column is 0.9375 cm