Physics

State one way of increasing the frequency of a note produced by an air column.

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As we know,

Frequency (f) = $\dfrac{1}{l}$

Hence, frequency is inversely proportional to length.

Therefore, an increase in the frequency of the note can be attained, by decreasing the length of the air column.

Answered By

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X	Y
(A) Natural vibrations	(1) A tuning fork when stroked on a rubber pad.
(B) Damped vibrations	(2) When a guitarist plucks or strums the guitar strings with his/her fingers.
(C) Forced vibrations	(3) When a troop crosses a suspension bridge.
(D) Resonant vibrations	(4) A load suspended from a spring.