NTA Abhyas JEE Main2020PhysicsWaves and SoundPractice
A transverse wave is propagating on a stretched string of mass per unit length 32 g m - 1 . The tension on the string is 80 N . The speed of the wave over the string is
Options
- A5 2     m   s - 1
- B5 2     m   s - 1
- C2 5     m   s - 1
- D50   m   s - 1
Correct answer
D. 50   m   s - 1
Step-by-step solution
Speed of wave in a string, v = T μ Given, T = 80   N μ = 32   g   m - 1 = 32 × 10 - 3   kg   m - 1 v = 80 32 × 10 - 3 = 8 × 10 4 32 = 100 × 1 2 = 50   m   s - 1