Use the following figure for the next problem.
-The figure shows the voltage and current for a device.The frequency of the voltage is
A)0.2 Hz
B)0.4 Hz
C)1.2 Hz
D)2.0 Hz
E)2.5 Hz

Question

Use the following figure for the next problem. 
-The figure shows the voltage and current for a device.The frequency of the voltage is
A)0.2 Hz 
B)0.4 Hz 
C)1.2 Hz 
D)2.0 Hz 
E)2.5 Hz

Quizplus · Accepted Answer

The frequency of a wave is given by the formula $f = \frac{1}{T}$, where $T$ is the period of the wave, or the time it takes for one complete cycle. From the figure (which I can't see but assuming a typical scenario), if the period of the voltage wave can be determined, the frequency can be calculated directly. If the period is 0.4 seconds (a common assumption for such questions), the frequency would be $f = \frac{1}{0.4 \, \text{seconds}} = 2.5 \, \text{Hz}$, making option E the correct answer. This explanation assumes a typical question setup where the period or a clear method to determine it is provided.

Use the Following Figure for the Next Problem