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Q.

In resonance column apparatus, for given tuning fork, first resonating length of air column is $l_{1},$ nd length of remaining water column is $^{'} 9 l_{1}'$ what is the maximum number of resonances that can be observed?

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a

8

b

10

c

9

d

5

answer is D.

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Detailed Solution

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Total length of pipe $= 10 l_{1}$

1^stresonance at $l_{1} so 2^{nd} at 3 l_{1}, 3^{rd} at 5$ $l_{1},$

$4^{th} at 7 l_{1} and 5 that 9 l_{1}$

$∴'5' resonances possible.$

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