Modelová Otázka ID 3270 - 
Jestliže mají dvě harmonická kmitání o stejné frekvenci i amplitudě konstantní fázový rozdíl (2 · k + 1) · π rad, kdy k je součástí množiny celých čísel, jaký je vztah této dvojice kmitání?
Správná odpověď je: B
Ve výrazu pro fázový rozdíl 2 · π · k rad představuje součin 2 · π rad = 360° dle fázorového diagramu 1 periodu daného kmitání. 2 kmitání, která se liší fázovým rozdílem představujícím celočíselný lichý násobek 2 · π rad, tedy kmitají s přesně opačnou fází.
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