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Exam Questions Papers - 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 modulated by a single sine wave. Determine the antenna current when the percent of modulation changes to 0.8

A 9.19 A

B 9.91 A

C 10.56 A

D 8.61 A

ANS:A - 9.19 A

Ic = 8 A m = 0.8 = 8 x 1.149 = 9.19 A.