Question

A sinusoidal carrier voltage is amplitude modulated The resultant amplitude modulated wave has maximum and minimum amplitude of $120 \, V$ and $80\, V$ respectively The amplitude of each sideband is :

• A. $10\, V$
• B. $5 \, V$
• C. $20 \, V$
• D. $15 \, V$

Answer 1

Answer: (A)

$10\, V$

Answer 2

Ac​+Am​=120
Ac​−Am​=80
∴Ac​​=100
Am​=20
Modulation index =10020​=51​
Amplitude of each sideband
=Ac​2( mod ulation index )​
=100×101​=10volt