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  • An audio signal of frequency 1 KHz and voltage 5 V is frequency modulated to a carrier , a maximum frequency deviation of 4.8 KHz takes place . The modulation index for the above frequency modulati

An audio signal of frequency 1 KHz and voltage 5 V is frequency modulated to a carrier , a maximum frequency deviation of 4.8 KHz takes place . The modulation index for the above frequency modulation is 

Option: 1

4.8


Option: 2

0.2


Option: 3

0.96


Option: 4

5


Answers (1)

best_answer

As we have learned

Modulation index of frequency modulation -

Ratio of maximum frequency deviation to the modulating frequency.

- wherein

m_{f}= \frac{\delta _{max}}{f_{m}}

= \pm \frac{KE_{m}}{f_{m}}

 

 Modulation index for frequency modulation is ratio between maximum frequency deviation and frequency of modulating signals 

m_f = \frac{maximum \: \: frequency \: \: deviation }{frequency \: \: of \: \: modulating \: \: signals }

        m_f = \frac{\delta _{max}}{f_m}

Here , m_f = \frac{4.8 KHz }{1KHz }= 4.8

 

Posted by

Rishabh

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