SHARPNESS OF RESONANCE

at resonance the amplitude of the oscillator

becomes very large

amplitude + sharpness depends upon

damping(inverse relation). smaller damping, greater will be the amplitude and more sharp will be the resonance

statement

a heavily damped system has a fairly flat resonance curve

effect of damping

it can be observed by attaching a pendulum having light mass such as a pith ball as its bob

another of the same length carrying a heavy mass such as a lead bob of equal size

they are set into vibrations by a third pendulum of equal length attached to the same rod.

the amplitude of lead ball is much greater than that of pith ball

the damping effect of the pith ball due to air resistance is much greater than the lead ball.

amplitude frequency graph

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