Free, Damped and Forced Oscillations — Chapter Summary
ICSE · Class 11 · Physics
Summary of Free, Damped and Forced Oscillations for ICSE Class 11 Physics. Part of the ICSE Class 11 Physics syllabus.
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Overview
Oscillatory motion changes in character depending on restoring force, damping, and external driving force. Free oscillations occur with constant amplitude in the absence of external force and without damping. Damped oscillations lose amplitude with time because energy is dissipated as heat. Forced o
Key Concepts
The definite frequency with which
The definite frequency with which a body oscillates when displaced from equilibrium and left free. It depends on intrinsic properties such as size, el
Oscillations of a body with constant
Oscillations of a body with constant amplitude in the absence of any external force and without damping.
Oscillations in which amplitude continuously decreases
Oscillations in which amplitude continuously decreases due to energy dissipation caused by damping force in addition to the restoring force. The lost
Oscillations produced when a body
Oscillations produced when a body is acted upon by an external periodic force and eventually oscillates with the frequency of that force, not its own
A special case of forced oscillation
A special case of forced oscillation in which the frequency of the external force equals the natural frequency of the body, or its integral multiple,
Learning Objectives
- Define natural frequency, free oscillations, damped oscillations, forced oscillations, and resonance.
- Explain why real oscillations lose amplitude with time.
- Describe how an external periodic force produces forced oscillations.
- Distinguish between sharp resonance and flat resonance.
- Identify common mechanical, acoustic, and electromagnetic examples of resonance.
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