PhysicsChapter 3: Waves
Resonance and Damping
Introduction
Resonance occurs when a system is driven by a periodic force at or near its natural frequency, causing a large-amplitude response. Every oscillating system has one or more natural frequencies.
Definition
Example
A swing moves to a larger amplitude when pushes are timed with its natural motion.
Damping
**Damping** is the reduction of oscillation amplitude due to energy loss, often through friction or resistance. A strongly damped system loses amplitude quickly.
Importance
Resonance can be useful in: * musical instruments; tuning circuits; sensors. It can also be dangerous in structures if large oscillations develop. Damping is used to control unwanted vibration.
Exam preparation
Exam Focus
Quick revision
Revision Zone
Review the key facts, formulas and checks before you move on.Resonance and Damping
Sticky Notes · Quick Revision
RESONANCE
- Drive ≈ natural frequency
DAMPING
- Amplitude decreases
60-second revision
- Resonance → drive ≈ natural frequency
- Damping → amplitude decreases
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