NEET Solved Paper 2018 Question 24
Question: A tuning fork is used to produce resonance in a glass tube. The length of the air column in this tube can be adjusted by a variable piston. At room temperature of $ \text{27 }{}^o\text{ C} $ two successive resonances are produced at 20 cm and 73 cm of column length. If the frequency of the tuning fork is 320 Hz, the velocity of sound in air at $ \text{27 }{}^o\text{ C} $ is [NEET - 2018]
Options:
A) 350 m/s
B) 339 m/s
C) 330 m/s
D) 300 m/s
Show Answer
Answer:
Correct Answer: B
Solution:
$ v=2(v)[L _2-L _1] $
$ =2\times 320[7320]\times 10^{2} $
$ =339.2ms^{1} $ $ =339m/s $
