Resonance describes the phenomenon of increased amplitude that occurs when the frequency of periodically applied force is equal or close to a natural frequency of the system in which it acts. When an oscillating force is applied at a resonant frequency of a dynamical system, the system will oscillate at a higher amplitude than when the same force is applied at other,non resonant frequencies.
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Answer:
Resonance describes the phenomenon of increased amplitude that occurs when the frequency of periodically applied force is equal or close to a natural frequency of the system in which it acts. When an oscillating force is applied at a resonant frequency of a dynamical system, the system will oscillate at a higher amplitude than when the same force is applied at other,non resonant frequencies.