Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoConductionMedium2 minPYQ_2009

PhysicsMediumsingle choice

A long metallic bar is carrying heat from one of its ends to the other end under steady-state. The variation of temperature $θ$ along the length $x$ of the bar from its hot end is best described by which of the following figure.

Options:

Answer:

Solution:

We know that $\frac{dQ}{dt} = KA \frac{d θ}{dx}$ In steady state flow of heat $d θ = \frac{dQ}{dt} \cdot \frac{1}{kA} \cdot dx \Rightarrow θ_{H} - θ = k^{'} x \Rightarrow θ = θ_{H} - k^{'} x$ Equation $θ = θ_{H} - k^{'} x$ represents a straight line.

Stream:JEESubject:PhysicsTopic:Heat & ThermoSubtopic:Conduction

⏱ 2mℹ️ Source: PYQ_2009

Doubts & Discussion

Loading discussions...