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JAMB Physics 2010 Question 24

Question 24

Waves

The wavelength of a wave travelling with a velocity of 420 ms−1 is 42 m. What is its period?

  1. A.1.0 s
  2. B.0.1 s
  3. C.0.5 s
  4. D.1.2 s
Show the answer and explanation

Answer: B (0.1 s)

Explanation

f = v/λ = 420 ÷ 42 = 10 Hz, so the period T = 1/f = 0.1 s.