If a message signal of frequency fm is amplitude modulated with a carrier signal of frequency fc and radiated through an antenna , the wavelength of the corresponding signal in air is :
[ Given , c = speed of electromagnetic wave in vacuum/air ]
A
cfc+fm
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B
cfc−fm
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C
cfm
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D
cfc
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Solution
The correct option is Dcfc The equation of an amplitude modulated wave is given by :