Subelement B: Electrical Math— Topic 11: Frequency
Question 3-11B2
Element 3 (GROL)The second harmonic of a 380 kHz frequency is:
Explanation
In radio theory, a harmonic is an integer multiple of a fundamental frequency. The "second harmonic" refers to the fundamental frequency multiplied by two.
To find the second harmonic of 380 kHz, you simply multiply:
380 kHz * 2 = 760 kHz.
Therefore, 760 kHz (option B) is the correct answer.
Option C, 190 kHz, would be the first subharmonic (380 kHz / 2), not a harmonic. Options A (2 MHz) and D (144.4 GHz) are incorrect values that do not represent a harmonic relationship with the given fundamental frequency.
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