Physics

(a) Name one factor on which the frequency of sound emitted due to vibration in an air column depends.
(b) How does the frequency depend on the factor stated in part (a)?

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(a) The frequency of sound emitted due to vibration in an air column depends on the length of air column.

(b) As we know,

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

Hence, frequency is inversely proportional to length, so in order to increase the frequency, the length has to be decreased.

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.