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Physics - Elasticity Question with Solution | TestHub

PhysicsElasticityMiscellaneousHard2 minPYQ_2020

PhysicsHardsingle choice

A wire of length $L$ , area of cross section $A$ is hanging from a fixed support. The length of the wire changes to $L_{1}$ when mass $M$ is suspended from its free end. The expression for Young's modulus is:NEET 2020 (Phase 1)

Options:

Answer:

Solution:

We know that,

Young's modulus, $Y = \frac{F L}{A Δ L}$

Given,

$F = Weight of suspended body= M g$ and $∆ L = L_{1} - L$ .

So, we can write

$Y = \frac{M g L}{A (L_{1} - L)}$

Stream:NEETSubject:PhysicsTopic:ElasticitySubtopic:Miscellaneous

⏱ 2mℹ️ Source: PYQ_2020

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