Question

In the case of forced oscillations, which of the following
statements is not true?
(a) Frequency equals that of external periodic force
(b) Amplitude depends upon the damping coefficient
(c) Amplitude tends to infinity at resonance
(d) Higher the damping coefficient, lower is the amplitude at
resonance​

Answer 1

Answer:

the correct answer of this question is option d

Answer 2

FORCED OSCILLATIONS

In case of forced oscillations, statement (C) Amplitude tends to infinity at resonance IS INCORRECT.

KEY POINTERS FOR FORCED OSCILLATIONS:

* When an oscillating system is propelled by a periodic force that is external to the oscillating system, forced oscillations occur. The oscillator is forced to move at the frequency vD = D/2 of the driving force in this example.

* When a periodic driving force is applied to an oscillator, the motion might appear chaotic. The oscillator's movements are referred to as transients. The oscillator enters a steady state, where the motion is periodic, once the transients have passed.