AP EAMCET201822 Apr 2018Evening ShiftPhysicsWaves and SoundActual
An object of density 2000 ~kg - m ⁻³ is hung from a thin light wire. The fundamental frequency of the transverse waves in the wire is 200 ~Hz . If the object is immersed in water such that half of its volume is submerged, then the fundamental frequency of the transverse waves in the wire is
Options
- A200 Hz
- B173.2 Hz
- C100 Hz
- D141.4 Hz
Correct answer
B. 173.2 Hz
Step-by-step solution
Fundamental frequency, initially n₁= 1 2 l T = 1 2 l V g(2000) Fundamental frequency, finally n₂= 1 2 l V g (2000- 1000 2 ) (here we applied loss of weight due to upthrust) aligned & = 1 2 l V g 1500 n₁ n₂ & = 2000 1500 = 4 3 n₂ & = n₁ 3 2 =100 3 ~Hz =173.2 ~Hz aligned