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A single of 5 kHz frequency is amplitude...

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

A

2MHz only

B

2005 kHz and 1995 kHz

C

2005 kHz 2000 kHz and 1995 kHz

D

2000 kHz and 1995 kHz

Text Solution

Verified by Experts

The correct Answer is:
C
Frequency associated with AM are ` f_(c)-f_(m),f_(c),f_(c)+f_(m)`
According to question `f_(c)=2MHz=2000 kHz `
`implies f_(m)=5 kHz `
Thus , frequency of the resultant signal is /are carrier frequency ` f_(c)=2000 kHz `, LSB frequency `f_(c)-f_(m)=2000kHz-5kHz =1995 kHz and USB` frequency ` f_(c)+f_(m)=2005 kHz `
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