1.

The aerial current of an AM transmitter is 18 A when unmodulated but increases to 20 A when modulated.The modulation index is(a) 0.68(b) 0.73(c) 0.89(d) 0.95I have been asked this question in unit test.The doubt is from Amplitde Modulation topic in division EDC Overview of Electronic Devices & Circuits

Answer»

The correct OPTION is (a) 0.68

To explain I would say: 400/326 = 1 + (α^2)/2, therefore α is 0.68.



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