The diagram above 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.
Determine the frequency of the waves
Attached Figure / Diagram
A
240Hz
B
24Hz
C
192Hz
D
286Hz
Verified Correct Answer: A.
Physical Principles & Numerical Solution
v = 120m/s, \lambda = 0.50m, f = ?
v = f\lambda
f = \(\frac{v}{\lambda} = \frac{120}{0.50}\)
Therefore, = 240Hz.
Source: Myschool Past Questions Archive (Record #69354)