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Oscillations

An oscillator...

Question

An oscillator is producing FM waves of frequency 2kHz with avariation of 10kHz. The modulating index=?

A

0.2

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B

5

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C

0.67

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D

1.5

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Solution

The correct option is B 5
Modulation Index , $m_{f} = \frac{Maximum frequency deviation}{Modulating frequency}$
$\Rightarrow m_{f} = \frac{10 k H z}{2 k H z}$
$\Rightarrow m_{f} = 5$

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