Respuesta :
Resonance is when your Forced vibration frequency is the same as your Natural frequency.
Answer:
Resonance = When the frequency of a forced vibration equals the natural frequency
Explanation:
Resonance occurs when the frequency at which the force is applied becomes equal to the natural frequency of the system on which it acts. At resonance, the system will oscillate with larger amplitude. The frequency at which resonance occurs is called resonant frequency.
Hence, the correct option is (a) " when the frequency of a forced vibration equals the natural frequency ".