MHT CET202121 Sep 2021Evening ShiftPhysicsWaves and SoundActual
The equation of simple harmonic wave produced in the string under tension 0.4 ~N is given by y =4 (3 x +60 t ) m . The mass per unit length of the string is
Options
- A10⁻³ ~kg ~m ⁻¹
- B10⁻⁵ ~kg ~m ⁻¹
- C10⁻³ ~g ~cm ⁻¹
- D10⁻⁵ ~g ~cm ⁻¹
Correct answer
A. 10⁻³ ~kg ~m ⁻¹
Step-by-step solution
The standard equation of a wave can be written as y = A ( kx + t ) Speed of wave V = k = 60 3 =20 ~m / s Also, V= T m m = T V ^2 = 0.4 400 =10⁻³ ~kg ~m ⁻¹