A string of density 7 . 5 g c m - 3 and area of cross-section 0 . 2 m m 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

Question

A string of density 7 . 5 g c m - 3 and area of cross-section 0 . 2 m m 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, 116 m s - 1, 40 m s - 1, 200 m s - 1, 80 m s - 1

MARKS App · Accepted Answer

The speed of the transverse wave v = T μ Given, T = 20 N , M l ⁡ = d × A l ⁡ l ⁡ = d × A ∴ = 20 7.5 × 0.2 × 10 - 3 2 v ≈ 116 m s - 1

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