The frequency of the wave in the diagram above is
Attached Figure / Diagram
A
0.17 Hz
B
0.25 Hz
C
1.57 Hz
D
1.05 Hz
Verified Correct Answer: B.
Physical Principles & Numerical Solution
Generally, period T = 1/f(reciprocal of frequency).
=> f = 1/T
And from the diagram, period T = 4s
∴ frequency, f = 1/T = 1/4 = 0.25 Hz
Source: Myschool Past Questions Archive (Record #14335)