A signal of 5 kHz frequency is amplitude modulated on a carrier wave of frequency 2 MHz. Frequencies of the resultant signal is/are:

In amplitude modulation, the frequencies of the resultant signal are given by:

• fc (carrier frequency)
• fc + fm (upper sideband frequency)
• fc - fm (lower sideband frequency)

where:

• fc = carrier frequency = 2 MHz = 2000 kHz
• fm = modulating signal frequency = 5 kHz

Therefore, the frequencies of the resultant signal are:

• fc = 2000 kHz
• fc + fm = 2000 kHz + 5 kHz = 2005 kHz
• fc - fm = 2000 kHz - 5 kHz = 1995 kHz

So the resultant signal contains frequencies of 2005 kHz, 2000 kHz, and 1995 kHz. The correct answer is 2005 kHz, 2000 kHz and 1995 kHz.