Question

A message signal of frequency 10kHz and peak voltage of 10 volts is used to modulate a carrier of frequency 1MHz and a peak voltage of 20 volts determine the modulation index.

Answer 1

So simple:

Modulate index = 10
                             20
                        = 0.5

Answer 2

$\huge\boxed{\underline{\mathcal{\red{A}\green{N}\pink{S}\orange{W}\blue{E}\purple{R}}}}$

• a) Modulation index = ${10/20 = 0.5}$
• b) The side bands are at ${(1000+10 kHz)=1010 kHz}$ and ${(1000-10kHz)=990kHz}$.