Download Aptitude Crack
img not found img not found

Communication Systems - Engineering

Q1:

The antenna current of an AM transmitter is 8 A. When only the carrier is sent, but it increases to 8.93 A. When the carrier is sinusoidally modulated. The percentage modulation is nearly

A 90%

B 80%

C 75%

D 70%

ANS:D - 70%

It = 8.93,
Ic = 8A,
It = Ic(1+(m^2)/2),
m= 0.701 =70%.