Assertion : Machine parts are jammed in winte | vedclass

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(A) The viscosity of a liquid is inversely proportional to its temperature. As the temperature decreases,the viscosity of the lubricant increases.Acco

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If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

Vedclass · Answer

(A) The viscosity of a liquid is inversely proportional to its temperature. As the temperature decreases,the viscosity of the lubricant increases.According to Newton's law of viscosity,the viscous drag force is given by $F = -\eta A \frac{dv}{dx}$,where $\eta$ is the coefficient of viscosity.Since the viscosity $\eta$ increases at low temperatures (in winter),the viscous drag force increases significantly.This increased resistance makes it difficult for the machine parts to move,causing them to jam.Therefore,both the Assertion and the Reason are correct,and the Reason is the correct explanation of the Assertion.

$Assertion :$ Machine parts are jammed in winter.
$Reason :$ The viscosity of lubricant used in machine parts increases at low temperatures.

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$Assertion :$ Machine parts are jammed in winter.$Reason :$ The viscosity of lubricant used in machine parts increases at low temperatures.