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Physics - Elasticity Question with Solution | TestHub

PhysicsElasticityMiscellaneousEasy2 minPYQ_2020

PhysicsEasysingle choice

A rod of length $l$ and radius $r$ is joined to a rod of length $\frac{l}{2}$ and radius of same material. The free end of small rod is fixed to a rigid base and the free end of larger rod is given a twist of $θ^{0}$ , the twist angle at the joint will be

Options:

Answer:

Solution:

$τ = C θ$

$= \frac{π ɳ r^{4} θ}{2 L} = c o n s t a n t$

⟹ $\frac{(θ - θ_{0})}{2} = \frac{θ_{0}}{16}$

⟹ $θ_{0} = \frac{8}{9} θ$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:ElasticitySubtopic:Miscellaneous

⏱ 2mℹ️ Source: PYQ_2020

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