The amplitude modulation A.M transmission frequencies range from:
Correct answer: C. 540 KHz to 1600 KHz
- A. 540 Hz to 1600 Hz
- B. 540 Hz to 1500 MHz
- C. 540 KHz to 1600 KHz
- D. None of these
Explanation
The Amplitude Modulated (AM radio) carrier frequencies are in the frequency range 535-1605 kHz. Carrier frequencies of 540 to 1600 kHz are assigned at 10 kHz intervals. AM radio uses the electrical image of a sound source to modulate the amplitude of a carrier wave.
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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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