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Standard XII

Physics

Amplitude of a Wave

Voltage of mo...

Question

Voltage of modulating wave of 5V with 10 MHz frequency was superimposed on carrier wave of frequency 20 MHz and voltage 20V then the modulation index is

0.25

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1.25

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2.43

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Solution

The correct option is A 0.25
$m = \frac{V_{m}}{V_{c}}$
$m = \frac{5}{20} = 0.25$

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Voltage of modulating wave of 5V with 10 MHz frequency was superimposed on carrier wave of frequency 20 MHz and voltage 20V then the modulation index is

The correct option is A 0.25m=VmVcm=520=0.25

The correct option is A 0.25
$m = \frac{V_{m}}{V_{c}}$
$m = \frac{5}{20} = 0.25$