A vibrator causes water ripples to travel acros... - JAMB Physics 2019 Question
A vibrator causes water ripples to travel across the surface of a tank. The wave travels 50cm in 20s and the distance between successive crests is 5cm. Calculate the frequency of the vibrator
A
5Hz
B
6Hz
C
5.2Hz
D
25Hz
correct option: a
| V = | distance
time |
= | 50 cm
25 |
= | 25 cm/s |
V = fλ
hence,
| f | = | V.λ |
| = | 25
5 |
= | 5Hz |
f = 5Hz
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