A carrier wave of peak voltage 15 {\V} is used to transmit ...

CBSE Class 12 Physics 2018 Delhi Set 1 Paper

Question : 10 of 26

Marks: +1, -0

A carrier wave of peak voltage 15V is used to transmit a message signal. Find the peak voltage of the modulating signal in order to have a modulation index of 60%.

Solution:

Formula for modulation index
Finding the peak value of the modulating signal
We have, µ=‌

Here, µ=60%=‌

∴Am=µAc=‌

×15V=9V

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