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Manipal MET2017PhysicsWaves and Sound

A string of density 7.5 ~g ~cm ⁻³ and area of cross-section 0.2 ~mm ^2 is stretched under a tension of 20 N . When it is plucked at the mid-point, the speed of the transverse wave on the wire is

Options

  1. A116 ~ms ⁻¹
  2. B40 ~ms ⁻¹
  3. C200 ~ms ⁻¹
  4. D80 ~ms ⁻¹

Correct answer

A. 116 ~ms ⁻¹

Step-by-step solution

The speed of transverse wave v= T m aligned & Given, T=20 ~N , M l = d A l l =d A & v= 20 10⁻³ 7.5 0.2 (10⁻³ )^2 & v 116 ~ms ⁻¹ aligned

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