Frequency deviation in FM is

Q.  Frequency deviation in FM is
- Published on 14 Oct 15

a. Change in carrier frequency to the frequency above and below the centre frequency
b. Formation of side bands
c. The variation of the instantaneous carrier frequency in proportion to the modulating signal
d. All of the above

ANSWER: All of the above
 
In Frequency Modulation, frequency of the carrier varies in accordance with the modulating signal. The variation of the instantaneous carrier frequency is proportional to the modulating signal. A number of side bands are formed. There is deviation of carrier frequency above and below the carrier frequency. This is known as frequency deviation.

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