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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoRadiationMedium2 minQB

PhysicsMediumstatement

A solid sphere of radius R and a hollow sphere of inner radius r and outer radius R made of copper are heated to the same temperature and are allowed to cool in the same environment. Then, choose the CORRECT statement :-

Options:

Answer:

Solution:

Rate of loss of heat $= \frac{dQ}{dt} = σ eA (θ^{4} - θ_{S}^{4})$ is equal $(\frac{d θ}{dt}) = \frac{σ eA}{ms} (θ^{4} - θ_{s}^{4})$ Since mass of hollow sphere is less its $\frac{d θ}{dt}$ is more

Stream:JEESubject:PhysicsTopic:Heat & ThermoSubtopic:Radiation

⏱ 2mℹ️ Source: QB

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