A tuning fork of frequency is sounded above an organ pipe of length

PHYSICS · Single correct · A Level · Physics · Waves · Waves

Problem

A tuning fork of frequency

340\,\text{Hz}

is sounded above an organ pipe of length

120\,\text{cm}

. Water is slowly poured into it. The minimum height of the water column required for resonance is: (Speed of sound in air

=340\,\text{m s}^{-1}

.) (1)

25\,\text{cm}

(2)

95\,\text{cm}

(3)

75\,\text{cm}

(4)

45\,\text{cm}