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Physics - Wave on String Question with Solution | TestHub

PhysicsWave on StringEquation/graphEasy2 minPYQ_2020

PhysicsEasysingle choice

The amplitude of the two waves is in ratio $5 : 2$ . If all other conditions for the two waves are same, then what is the ratio of their energy densities?

Options:

Answer:

Solution:

Energy density of wave is given by

$u = 2 π^{2} n^{2} ρ a^{2}$

Or $u \propto a^{2} (a s n a n d ρ a r e c o n s a n t s)$

$∴ \frac{u_{1}}{u_{2}} = \frac{a_{1}^{2}}{a_{2}^{2}} = \frac{5^{2}}{2^{2}}$

So, $u_{1} : u_{2} = 25 : 4$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Wave on StringSubtopic:Equation/graph

⏱ 2mℹ️ Source: PYQ_2020

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