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Physics - Elasticity Question with Solution | TestHub

PhysicsElasticityMiscellaneousMedium2 minPYQ_2014

PhysicsMediumsingle choice

Copper of fixed volume $V$ is drawn into wire of length $l$ . When this wire is subjected to a constant force $F,$ the extension produced in the wire is $∆ l .$ Which of the following graph is a straight line?NEET 2014

Options:

Answer:

Solution:

$V = A l$
$Y = \frac{F / A}{\frac{∆ l}{l}}$
$\frac{Y ∆ l}{l} = \frac{F}{A}$
$∆ l = \frac{F l}{Y A} = \frac{F}{Y} . \frac{l l}{V}$
$∆ l = \frac{F}{Y V} l^{2}$
$∆ l \propto l^{2}$

Stream:NEETSubject:PhysicsTopic:ElasticitySubtopic:Miscellaneous

⏱ 2mℹ️ Source: PYQ_2014

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