Question

1. what is the fundamental frequency of this ac sine wave?

a. 4 hz
b. 8 hz
c. depends on the harmonic frequency
d. depends on the harmonic number
0 v
1 second

Explanation:

Step1: Determine number of cycles

Count the number of complete sine - wave cycles in 1 second. From the graph, there are 4 complete cycles in 1 second.

Step2: Calculate fundamental frequency

The fundamental frequency \(f\) is the number of cycles per second. Using the formula \(f=\frac{n}{t}\), where \(n\) is the number of cycles and \(t\) is the time in seconds. Here, \(n = 4\) and \(t=1\) second, so \(f = 4\ Hz\).

Answer:

A. 4 Hz