1.

A closed organ pipe of length 28 cm closed at one end is found to be at resonance when a tuning fork of frequency 850Hz is sounded near the open end. Ifvelocity of sound in air is 340 m/s, then the

Answer»

air in the PIPE is VIBRATING in fundamental mode
air in the pipe is vibrating in FIRST overtone
end correction of the pipe is 1cm
end correction of the pipe is 2cm.

Solution :BD
`lambda=(v)/(u)=40 cm`
`(3lambda)/(4)=28+eimplies"first overtone"`


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