First slide

Standing waves

Question

Tube A has both ends open while tube B has one end closed, otherwise they are identical. The ratio of fundamental frequency of tube A and B is

Moderate

A

1 : 2
B

1 : 4
C

2 : 1
D

4 : 1

Solution

$n_{A} = \frac{v}{2 l}; n_{B} = \frac{v}{4 l} \Rightarrow \frac{n_{A}}{n_{B}} = 2 : 1$

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