You can be certain that the driving frequency is not matched to the natural frequency of the oscillatory system, therefore correct answer is option 3.
It can be defined as the number of cycles completed per second.It is represented in hertz and inversely proportional to the wavelength.
C=λν
As given in the problem If you are driving an oscillatory system at a certain frequency, but the amplitude is much smaller than it could be, you can be certain that the driving frequency is not matched to the natural frequency of the oscillatory system.
Thus, the correct answer is option 3.
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The question is incomplete, the complete question is,
If you are driving an oscillatory system at a certain frequency, but the amplitude is much smaller than it could be, you can be certain that
1. The driving frequency is too low.
2. The driving frequency is too high.
3. The driving frequency is not matched to the natural frequency of the oscillatory system.
