A) If both assertion and reason are true and the reason is the correct explanation of the assertion.
B) If both assertion and reason are true but reason is not the correct explanation of the assertion.
C) If assertion is true but reason is false.
D) If the assertion and reason both are false.
E) If assertion is false but reason is true.
Correct Answer: C
Solution :
Amplitude of oscillation for a forced, damped oscillator is \[A=\frac{{{F}_{0}}/m}{\sqrt{({{\omega }^{2}}-\omega _{0}^{2})+{{(b\omega /m)}^{2}}}},\]where b is constant related to the strength of the resistive force, \[{{\omega }_{0}}=\sqrt{k/m}\] is natural frequency of undamped oscillator (b = 0). When the frequency of driving force (w) » \[{{\omega }_{0}}\], then amplitude A is very larger. For w < w0 or w > w0, the amplitude decrease.
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