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Wave Equation of EM Waves

A 600 W car...

Question

A $600 W$ carrier is modulated to a depth of $75 %$ by a $400 H z$ sine wave. The total antenna power is

A

769 W

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B

796 W

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C

679 W

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D

637.5 W

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Solution

The correct option is A $769 W$
$P_{t o t} = P_{c a r r i e r} (1 + \frac{m^{2}}{2})$
$= 600 (1 + \frac{{0.75}^{2}}{2}) = 768.75 K W$ .

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