In case of a forced vibration,the resonance wave becomes very sharp when the:

Resonance is an example of

In forced oscillations,a particle oscillates simple harmonically with a frequency equal to

If the amplitude of a damped harmonic oscillator becomes half of its initial amplitude in a time of $10 \ s$,then the time taken for the mechanical energy of the oscillator to become half of its initial mechanical energy is (in $s$)

Explain the behaviour of the oscillator when the driving frequency is close to the natural frequency in small damped oscillation and define resonance.

When an oscillator completes $100$ oscillations,its amplitude is reduced to $\frac{1}{3}$ of its initial value. What will be its amplitude after it completes $200$ oscillations?