In process of amplitude modulation of signal to be transmitted .
Signal to be modulated is given by `m(t)=A_(m) sin omega_(m)t`, carrier wave is given by ` c(t)=A_(c) sin omega_(c)t `, modulated signal ` c_(m)(t)` is given by

Options

A. `C_(m)(t)=A_(c) sin omega_(c)t+A_(m) sin omega_(m)t`
B. `C_(m)(t)=(A_(c)+A_(m)) sin omega_(c)t `
C. `C_(m)(t)=[A_(c) +m(t)] sin omega_(c) t `
D. None of the above

Answer

C

Explanation

In amplitude modulation , amplitudes of carrier wave varies with signal to be modulated . So modulated signal ` C_(m)(t) ` is given by `C_(m)(t)=[A_(c)+m(t)] sin omega_(c)t`
`C_(m)(t)=[A_(c)+A_(m) sin omega_(mt)]sin omega_(c) t{ :' m(t) =A_(m) sin omega_(m) t}`