Distinguish between forced vibrations and resonance.
|1||It is produced by an external periodic force of any frequency.||It is produced by an external periodic force
whose frequency is equal to the natural
frequency of the body
|2||The frequency of vibrations is
different from the natural frequency of the body
|The frequency of vibrations is sa me as the natural frequency of the body.|
|3||The amplitude of vibration is small.||The amplitude of vibration is very large.|
|4||Vibrations stop as soon as the
external force is removed.
|Vibrations continue for some time even after the external force is removed|
|5||Faint sound is produced.||Loud sound is produced.|
Mode of vibration of a stretched string in second harmonic:
Mode of vibration of a stretched string in third harmonic:
Concept: Free and Forced Vibrations
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