A transverse wave is applied to a string whose mass per unit length is 3…

A transverse wave is applied to a string whose mass per unit length is 3 x 10^-2kgm^-1. If the string is under a tension 12N, the speed of the propagation of the wave is

Correct Answer: Option B

Explanation

For transverse wave on string
velocity V = √^T/_M
where T is the tension, and M is the mass per unit length
∴ for T = 12N and M = 3.0 x 10^-2kgm^-1V=
√ 12 / (3.0×10^-2  =
√ 12 / 0.03  =
√ 1200 / 3  =
√ 1200 / 3 = 20
∴V = 20m/s