Q. The length of a sonometer wire tuned to a frequency of $250\ Hz$ is $0.60\ metre.$ The frequency of tuning fork with which the vibrating wire will be in tune when the length is made $0.40\ metre$ is
A) $250\ Hz$
B) $375\ Hz$
C) $256\ Hz$
D) $384\ Hz$
Explanation
(b) $n_{1}l_{1} = n_{2}l_{2} \Rightarrow 250 \times 0.6 = n_{2} \times 0.4 \Rightarrow n_{2} = 375Hz$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.