The antenna current of an AM broad cast transmitter, modulated to a de – McqOptions

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1.	The antenna current of an AM broad cast transmitter, modulated to a depth of 40% by an audio sine wave is 11 amperes. It increased to 12 ampere as a result of simultaneous modulation by another sine wave. The modulation index due to this second sine wave is :
A.	0.4
B.	0.757
C.	0.643
D.	0.8
Answer» D. 0.8

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