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A steel wire of mass per unit length 7.0×10⁻³ kg m⁻¹ is under a tension of 70 N. The speed of transverse waves in the wire is

Asked in JEE Main 1st Feb 1st Shift 2023 · Transverse wave on a string

• (1) 10 m s⁻¹
• (2) 100 m s⁻¹
• (3) 200π m s⁻¹
• (4) 50 m s⁻¹

Step-by-step solution

Why the other options are wrong

• (1) Forgets to take the square root of 10⁴.
• (3) Introduces a spurious factor of π.
• (4) Halves the correct result.

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