

MCQOPTIONS
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1. |
If two perfect sine waves have the same frequency and the same amplitude, but are in opposite phase, the composite wave |
A. | Has twice the amplitude of either input wave alone |
B. | Has half the amplitude of either input wave alone |
C. | Is complex, but has the same frequency as the originals. |
D. | Has zero amplitude ( that is, it does not exist) because the two input waves cancel each other out. |
Answer» E. | |