The fundamental frequency for harmonics of 200 Hz and 300 Hz would be
A)60 Hz.
B)121 Hz.
C)100 Hz.

Question

Quizplus · Accepted Answer

The fundamental frequency (first harmonic) is equal to the lowest frequency present in the harmonic series. In this case, the lowest frequency present is 200 Hz. Therefore, the fundamental frequency is 200 Hz. For the second harmonic, the frequency is twice the fundamental frequency, so it would be 400 Hz (2 x 200 Hz). For the third harmonic, the frequency is three times the fundamental frequency, so it would be 600 Hz (3 x 200 Hz).

Similarly, for the 300 Hz harmonic series, the fundamental frequency is 300 Hz. The second harmonic would be 600 Hz (2 x 300 Hz) and the third harmonic would be 900 Hz (3 x 300 Hz).

Therefore, there is no common factor or shared fundamental frequency between the two harmonic series. The best choice is C, 100 Hz, which is not a harmonic of either series.

The Fundamental Frequency for Harmonics of 200 Hz and 300