A \( 100 \mathrm{~V} \) carrier wave is made to vary between \( 160...

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A \( 100 \mathrm{~V} \) carrier wave is made to vary between \( 160 \mathrm{~V} \)
\( \mathrm{P} \) and \( 40 \quad V \) by a modulating signal. What is the

W modulating index?
(1) 0.3
(2) 0.5
(3) 0.6
(4) 0.4
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