1.

A particle with restoring force proportional to displacement and resisting force proportional tovelocity is subjected to a force F sin omegat . If the amplitude of the particle maximum for omega=omega_(2) then (omega_(0) is the angular frequency of undampled oscillations ).

Answer»

`omega_(1)=omega_(0) ` and `omega_(2)!=omega_(0)`
`omega_(1)=omega_(0) ` and `omega_(2)=omega_(0)`
`omega_(1)!=omega_(0) ` and `omega_(2)=omega_(0)`
`omega_(1)!=omega_(0) ` and `omega_(2)!=omega_(0)`

SOLUTION :Amplitude RESONANCE TAKES place at a frequency of external force which is LESS than the frequency of undampled vibrations. The velocity resosnace (max. energy) takes place when frequency of external periodic force is equal to the NATURAL frequency of undamped vibrations.


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