The diagram below illustrates a mode of vibration of a wire of length 125 cm.
PHYSICS
WAEC 2023
The diagram below illustrates a mode of vibration of a wire of length 125 cm. The speed of the waves along the wire is 120 ms-1. Use the diagram to answer questions 2 and 3.
- A. 1.00m
- B. 0.75m
- C. 0.25m
- D. 0.50m
Correct Answer: D. 0.50m
Explanation
Number of cycles, n = \(2\frac{1}{2} = \frac{5}{2}\)
Length = nλ
λ = \(\frac{Length}{n}\) = \(\frac{125}{\frac{5}{2}}\)
Therefore, λ = 50cm = 0.50m.
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