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electronics and communication engineering communication systems
1. A signal m(t) amplitude modulates a carrier Ac cos ωct. The final signal will be
(A): Ac + [m(t)] cos ωct
(B): Ac . [1 + m(t)] cos ωct
(C): Ac cos ωct + m(t)
(D): [Ac m(t)] cos ωct]
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