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JAMB Physics 2000 Question 24

Question 24

Waves

A transverse wave is applied to a string whose mass per unit length is 3 × 10−2 kg m−1. If the string is under a tension of 12 N, the speed of propagation of the wave is

  1. A.40 m s−1
  2. B.30 m s−1
  3. C.20 m s−1
  4. D.5 m s−1
Show the answer and explanation

Answer: C (20 m s−1)

Explanation

v = √(T/μ) = √(12/0.03) = √400 = 20 m s−1.