The process of combining low frequency signal with high frequency radio waves is called:
Correct answer: C. Modulation
- A. Resonance
- B. Fluctuation
- C. Modulation
- D. Amplitude
Explanation
The method of superimposing an audio signal over the carrier wave is called modulation.
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About Alternating Current
Alternating current varies periodically, so phase relationships become essential when current passes through a resistor, capacitor or inductor. The chapter distinguishes resistance from capacitive and inductive reactance, explains phase lead and lag, and connects changing electric and magnetic fields with the production and properties of electromagnetic waves.
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