Resonance occurs when
Correct answer: A. the driving frequency equals the natural frequency of the system
- A. the driving frequency equals the natural frequency of the system
- B. the driving frequency is much higher than the natural frequency
- C. the amplitude is very small
- D. there is no damping present at all
Explanation
At resonance energy is transferred most efficiently to the oscillator and the amplitude builds to a large value, limited only by damping. It explains why a radio can be tuned to one station, why a wine glass can be shattered by a sung note, and why marching troops break step on a bridge. Damping reduces the peak amplitude but does not abolish the effect.
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About Simple Harmonic Motion
Simple harmonic motion is oscillation in which acceleration is directly proportional to displacement and directed toward the equilibrium position. Work includes displacement, velocity, acceleration, phase, period, frequency, amplitude and energy, with applications to springs and simple pendulums. The restoring force and the conditions for SHM distinguish it from general periodic motion.
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