Waves
© examsnet.com
Question : 3
Total: 27
A steel wire has a length of 12.0 m and a mass of 2.10 kg. What should be the tension in the wire so that speed of a transverse wave on the wire equals to the speed of sound in dry air at 20 °C = 343 m s – 1
Solution:
Here, l = 12.0 m s – 1
Mass per unit length, µ
=
=
= 0.175 k g ∕ m − 1
As,v = √
∴ T = v 2 . µ = ( 343 ) 2 × 0.175 = 2.06 × 10 4 N
Mass per unit length, µ
As,
© examsnet.com
Go to Question: