The frequency of a periodic wave is 340 Hz. The period of the vibration motion of the wave is
A) 2.56 milliseconds.
B) 2.94 milliseconds.
C) 3.55 milliseconds.
D) 3.94 milliseconds.
E) 4.25 milliseconds.

Question

Quizplus · Accepted Answer

Frequency (f) is the reciprocal of period (T), so: 
f = 1/T 
T = 1/f 
T = 1/340 Hz = 0.00294 seconds = 2.94 milliseconds. Therefore, the correct answer is choice B.

The Frequency of a Periodic Wave Is 340 Hz