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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoThermal ExpansionMedium2 minQB

PhysicsMediumsingle choice

A solid sphere of radius $r$ and coefficient of linear expansion $α$ rotates about an axis through its centre in the absence of external torque. What temperature change will increase its angular velocity by $1%$ ?

Options:

Answer:

Solution:

$I ω$ is constant and
$I \propto r^{2}$
$\frac{Δ ω}{ω} = - 2 α Δ T = 0.01$
$Δ T = - \frac{1}{200 α}$
a decrease.

Stream:JEESubject:PhysicsTopic:Heat & ThermoSubtopic:Thermal Expansion

⏱ 2mℹ️ Source: QB

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