First slide

Stationary waves

Question

If in an experiment for determination of velocity of sound by resonance tube method using a tuning fork of 512 Hz, first resonance was observed at 30.7 cm and second was obtained at 63.2 cm, then maximum possible error in velocity of sound is (consider actual speed of sound in air is 332 m/s)

Moderate

A

204 cm/sec
B

110 cm/sec
C

58 cm/sec
D

80 cm/sec

Solution

Using $λ = 2 (l_{2} - l_{1}) \Rightarrow v = 2 n (l_{2} - l_{1})$
$\Rightarrow 2 \times 512 (63 .2 - 30 .7) = 33280 cm / s$
Actual speed of sound $\Rightarrow 2 \times 512 (63 .2 - 30 .7) = 33280 cm / s$
Hence error $= 33280 - 33200 = 80 cm / s$

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App