Q

I have a doubt, kindly clarify. - Properties of Solids and Liquids - JEE Main-2

A beaker contains a fluid of density kg/m3, specific heat S J/kg 0C and viscosity . The beaker is filled up to height h. To estimate the rate of heat transfer per unit area (Q /A) by convection when beaker is put on a hot plate, a student proposes that it should depend on ,

when    (in) is the  difference in the temperature between the bottom and top of the fluid. In that
situation the correct option for (Q /A) is:

• Option 1)

• Option 2)

• Option 3)

• Option 4)

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As we learnt in

Viscosity -

It is property of liquid due to which it opposes the relative motion between the layers

- wherein

Which is also known as fluid friction or internal friction

It will be mgh because at all the points of a fluid are equal.

$\eta\frac{S\Delta \Theta}{h}$

Correct option is 1.

Option 1)

This is the correct option.

Option 2)

This is an incorrect option.

Option 3)

This is an incorrect option.

Option 4)

This is an incorrect option.

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