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  • In a resonance column, two successive resonances are obtained at depth <img alt="\mathrm{ 30 \mathrm{~cm} \: and \: 50 \mathrm{~cm}}" src="https://entrancecorner.oncodecogs.com/gif.latex?%5Cma

In a resonance column, two successive resonances are obtained at depth \mathrm{ 30 \mathrm{~cm} \: and \: 50 \mathrm{~cm}} respectively. They next resonance will be obtained at a depth -
 

Option: 1

\mathrm{60 \mathrm{~cm}}
 


Option: 2

\mathrm{80 \mathrm{~cm}}

 


Option: 3

\mathrm{70 \mathrm{~cm}}
 


Option: 4

\mathrm{90 \mathrm{~cm}}


Answers (1)

best_answer

Given, \mathrm{\frac{\lambda}{2}=(50-30) \mathrm{cm}=20 \mathrm{~cm}}
Neat resonance will be obtained at \mathrm{50+\frac{\lambda}{2}}

                                                  \mathrm{=70 \mathrm{~cm}}.

Hence option 3 is correct.
 

Posted by

Ritika Jonwal

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