If the frequency of 3 KHz has to be transmitted through...

If the frequency of $3 \mathrm{KHz}$ has to be transmitted through amplitude modulation. Which of the following frequency should use as a carrier frequency?
(A) $30 \mathrm{~Hz}$
(B) $300 \mathrm{~Hz}$
(C) $3000 \mathrm{~Hz}$
(D) $3 \mathrm{MHz}$

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Key Concepts

Frequency Spectrum Consideration

When selecting a carrier frequency for amplitude modulation, it is important to consider that the carrier must be high enough relative to the modulating frequency. This separation prevents the original modulating signal from interfering with the transmitted signal and ensures that the sidebands (which contain the modulated information) are appropriately located around the carrier frequency.

Amplitude Modulation

Amplitude modulation is a technique used to transmit information over a carrier wave by varying its amplitude according to the modulating signal. This method shifts the information from a lower frequency, such as an audio or other baseband signal, to a higher frequency suitable for efficient transmission.

Carrier Frequency

A carrier frequency is the high-frequency signal that is modified by the modulating signal in amplitude modulation. It is chosen to be significantly higher than the frequency of the modulating signal to allow for proper separation in the frequency spectrum and to facilitate effective transmission and reception.

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